@@user-op8fg3ny3j Life insurance is to protect your earning potential, not your current holdings. It covers what he would have brought home to his family for the remainder of his career.
The "Warnung" is the actual German word for "warning." You can tell it's meant to be one of those multi-language labels because of the Spanish "peligro" below it and the French "attention" to the lower-left. The issue is they didn't put a single other German word on it.
I miss these types of "Don't ever do anything you see in this video, but here's some detailed instructions on how to do it" videos. It reminds me of an old video where Linus showed us how to make our own 7v fan speed reducer out of extra molex adapters.
If you dig into the 20/24pin connector, you can also find -5v and -12v to play with, giving you a voltage choice of 5, 7, 10, 12, 17, or 24 volts to play with If you also use the +3.3v line, you have 1.7, 3.3, 5, 7, 8.3, 8.7, 12, 15.3, 17 and 24 volts to play with
I test car and home amplifiers to show their actual power output because this has gotten so out of hand! Many use “MAX” ratings we call “ILS” ratings (if lightening strikes) 😬
Even for reputable brands? Because I mean if you buy a 5000W amp from some chinese seller for 30 bucks you can be sure it won't even reach that. It's like these 5 TB USB sticks from wish. But I doubt Yamaha would lie about the output.
@@KiinaSu years ago reputable manufacturers Kenwood, Alpine, Pioneer, JVC, Sony, and Panasonic claimed double the wattage for peak envelope power or pep. I believe it was jenson that started the max power. And if you're old enough you'll remember Roadmaster they was the worst
@@minenachos But reputable manufacturers had still the sinus Wattage somewhere written down. At least here in Germany (we have great consumer laws which sometime enforce such comparable moves, don't know if it was enforced.)
Dewalt's drills are/were branded "20v MAX"... that was not saying they are 20v tools, they are 18v tools with a surge draw of 20v max... they actually had to change the branding in some places (aus if memory serves)
In three wire 220/240 volt(or four wire for that matter) where the two hots go doesn't matter since they are completely opposite phases and are indistinguishable on the device side, it also doesn't have a neutral because it creates a phantom neutral at the center point of the two phases
@@TealJoshbecause in North America they are often the same thing when you're dealing with 120 volt outlets (don't worry about it. It's confusing and stupid)
They would’ve needed a clamp amperage meter on each of the hot legs because those kilowatt power meters I think only work on 120 V if they plug that into their modified extension cord they would fry it
@@BlueHound Unless the PS was connected to power I can think of no way a transformer could possible injure someone (other than a possibly sharp edge or something pointy sticking out of them). Also Linus seems to think Transformers have magnets...since when do transformers have magnets in them?
They stated early on that both PSUs had been powered off for over a year so we're safe to touch. Normally you wouldn't want to touch as the capacitors could still hold a charge
Like they are propably safe after a few weeks, they are 99,99999% safe after a few month, that being said. Don't touch them they could theoretically still hold a charge but you know, they propably dont
This is exactly the thing that I was thinking. Why risk good or even decent components when you have a testing unit that can stress test, and survive any power supply jankness that ensues? Like...mosfets explody?
okay, I actually jumped at the point where they pranked Linus when he put his head against the PSU. Send this to GN as a gift to see if they can blow it up with their tester.
Watch what happens when you put a toaster meant for 120v on 240v. The issue isn't necessarily that 240v is dangerous (though technically it is) but that this is thorough misuse of cabling which creates an inherent feeling of risk since it can overheat, melt, catch fire, short, etc etc.
@@ChilenonetoRUclips Because the cable should always be able to handle more load than the breaker, and I'm assuming they don't use the little 12 or 16A breakers for their 240V circuits ther like we do in Europe. So the current could be a LOT higher, hence the bigger cables for these systems. Obviously that cable was oversized for the PC, but not for the breaker.
If Alex is there, you know something is going to be very questionable in terms of if it’ll work. That said, 2000W may be more needed at the rate CPU & GPU power consumption rates are increasing at.
That's an understatement. At the rate we're going we will need electricians to install a dedicated circuit for the computer. Not to mention a second air conditioner for the gaming room.
We are at a time when we need to work on efficiency (climate change and oil prices) and those companies are just going backwards. People should boycott those extremely inefficient GPUs but who am I kidding.
@@thunderarch5951 cpus won't take more than 250 at the max, rest of the computer maybe 150, that's 400, max load, with the 4090ti being around 500 watts. 1000 is fine
Considering that he is an eletric engineer, he probably knew that he PSU had been off the grid for over a year and so its safe to touch. The warning was more for casuals like us, because if you touch does a day after you used it, you are gonna die
@@gamm8939 I have taken electric shocks from PSU's like that countles times. I never learn. Long as the current doesnt get through your heart or other organs you are fine. Mostly my fingers have got some nice jolt of electricity, i wear rubber work boots and im careful to not touch with second hand to something else when im checking things. I yesterday got such jolt from TV's psu because i touched wrong component accidentally, it was plugged to wall when diagnosing. So no you are not going to die if you are not touching something else same time or if floor doesnt conduct electricity
@@sxndwich3395 I would literally trust Anthony to do anything and succeed. My best friend it's like a copy of Anthony and he can't even burn food. It's impossible to him to fail. I love both Alex and Anthony tho. I just really think people underestimate Anthony but 7 bet Linus knows exactly what he hired when he hired Anthony. #Anthonysquad
Yep my first thought was like man this would be a lot safer if they borrowed Tech Jesus's equipment. But that'd possibly get less views...people like danger.
@Linus Tech Tips - You would be much saver when fixing a German / Korean style (recessed earthed) outlet to the output of your modified cable , because Germany has 230 Volts ( + 16 Amps) & there are plenty o IEC computer power supply cables for German / Korean outlets ... the 2x 110 Volts in Canada / USA are no problem at all because the German plug / outlet is not polarized anyway & some regions use 2x 110 Volts with German style outlets (50 or 60 Hz) ... AND don't forget to crimp the fine strands of the flex ! Also the German / Koren system does not let you touch live contacts (in opposite to the literally shocking Canada / USA system) ... Trust me I know what I tell you , I'm a German & I did serval plugs / outlets my self & even connected a 3 phase stove ( 400 Volts) without ANY incidents over the years
If you have half a brain and know how to read a basic wiring diagram neither of those are that hard, now if you're doing it live that's when you need some more finesse
"Do NOT ever do anything we've done in this video. That being said, here's HOW you do it." These guys know that people are morons and want you to at LEAST know how to properly do something stupid BEFORE they go and hurt themselves. How responsible!
Though they could have just taken a little extra effort to do it right in the first place, and also replaced the NEMA 5-15 outlet with an IEC C13 outlet (that plugs directly into the PSU), avoiding ever having 240 V power on a 120 V outlet. Even easier yet, as well as more flexible, would just be to buy a North American 240 V extension cord and put their 240 V connector directly on the IEC cord, so you'd still have just one plug to replace and it would be utterly clear (because of the short cable length) that the IEC cable was 240 V.
@@Ormathon I hope that it blows the gigabyte PSUs out of the water when it fails, pun intended. :D Would be great to watch if one of the main switching FETs would completely grenade the entire board when blowing up.
They should have cut out the whole part about making the cable and not shown the plug. That's better than saying "don't ever do this" and then show step by step how to do it.
Which is why I COMPLETELY disagree. THIS is exactly what Louis Rossmann complains about, the culture of ownership and repairing your own things yourself is dying because you are obsessed with safety, even with something as EXTREMELY simple as an extension cord
@@PippetWhippet obviously, because my hands grow out of the correct spot and i actually can fix home appliances myself. and i live in a country with 220v standard.
@@09f9 An imported one could be both fairly cheap and 220V. True it would have needed a corresponding power socket and IEC lead from a 220/240V country too. That wouldn't be a bad idea though, no need for the sketchy warning label to indicate the voltage.
@@mlw19mlw91 He could calculate the power drawn by the computer, if he knew the efficiency of the power supply. As i understand they are estimating the power consumption of the computer... They have no clue if the power supply can out put 2 kilo watt. If they knew the power draw than they could calculate the efficiency, YES!
I think the 3.3V and 5V rails together are not supposed to exceed a combined 150 watts and that is why they are stuck together in the table. It is a quirk of how some multi-rail power supplies are designed, usually because there is a tap on a secondary winding of the transformer that causes this where if they were separate secondary windings altogether it would not have that limitation. That leaves 150 + 1800 + 6 + 10 = 1966 watts total which is close enough. They may have just mislabeled the 12v rail.
@KABAKOKSEK Often times consumer PSUs are built to offer options on how you want to distribute the total wattage. Each rail is separately able to support higher wattage, but there is a tighter limit on how much they can add up together. This means that the beefiest components (AC side) can be built to lower spec, which lowers cost.
As you are really knowledgeable about physics could you tell me how would one go around calculating V,I,R when two of these are given both in series and parallel. It would really help if you could tell me how to for example mathematically separate currents at the two resistors in parallel to compute their values when V and R are given. I have a test on Tuesday and would really appreciate the help. All 6 scenarios for series and parallel.
@@skyemperor2357 since you are already on youtube, there are tons of videos about ohm's law that are great and would surely teach you the simple concept albeit hard to imagine for beginners. Also, your question is a bit broad and unclear. This comment is also not talking about resistance, but power. Goodluck to your exam.
"Don't touch these" *electrical expert touches them*..... On a serious note, they aren't stressing it enough in the video and explaining why it's so dangerous to open a power supply. The caps can hold charge long after being unplugged! It literally can kill you folks! Same goes for appliances like a microwave.
What you say is true, but it's also true that most reputable power supplies have bleeder resistors across their large caps, so they will be completely safe within a few minutes, worst case. So, the Silverstone, probably perfectly fine. The other one. Who knows. If they copied a Great Wall, and didn't skip those components to save a few cents, maybe.
@@niky00045 Pretty much true, but it is also possible to stop your heart with the energy stored in a cap, especially a large one. Just depends on the path the electricity takes as it flows through your body. That's why TV repairmen often worked with one hand behind their back - to try to prevent any shocks from flowing through their heart.
In all reality, if Intel and Nvidia can't get their power efficiency under control, we may actually see a need for 220v PSUs to handle more than 1800w.
@8:35 "NTC" stands for negative temperature coefficient, these devices are used for inrush limiting. When you first plug the power supply in all those caps will be charged, and without that NTC resister it can blow fuses or breakers.
@@plazasta it could conceivably get that award, however I don't know if it could get the: "better than Dell" award, because that's the only place where Dell doesn't suck as much as they usually do. Still a very low bar.
I feel like a better method of hitting that 2000 watts may have just been to use it as intended. With some risers, and like 8 low end cards mining, you could easily hit a higher power draw. I understand not wanting to risk high end hardware, but surely they could use a bunch of old RX cards at least. I was curious when it would stop working and if it could actually deliver 2000w. Sometimes PSU companies will list a peak rating and not sustained. Also I would have loved to see a Kill-A-Watt or something like it with a real wattage read out. Would love to see a revisit someday.
Yeah I was expecting the same thing. Just use mining software to push the wattage limits, it's so easy to versus the trouble he was having running benchmarks on individual cards at the same time.
Also it's probably only useful in countries where power is free for the individual, considering how power inefficient that thing would be and how much profit you'd end up losing to electricity bills.
@@iClone101 certain regions in china has very cheap electricity, and are often chosen as mining sites before the legality shifts. i've heard electricity as low as 5 cents per kilowatt. some miners simply build water dams to power their mines. electrical cost is almost negligible for eth mining.
Power in Japan is much more messed up. They run at 100v Ac but the east and west run a different frequencies (50/60 hz). This can mess up motors or time keeping equipment built for the other frequency and require huge height voltage dc interconnects to merge the different grids.
Not to mention that 100V and 50Hz is pretty much the worst combination for operating single-phase rectifier loads... Lowest possible voltage and longest interval between capacitor re-charges.
@@knislappen iirc it's due to post-ww2 aid in rebuilding infrastructure - one side adopted 50hz (German system) and the other 60hz (US system). i don't remember the specifics but it's related to who aided and also the country being occupied postwar
yeah there is equipment to test volts and watts for f sake... buut LTT has to do stuff sensational for views... (dont get me wrong I love these guys but still lol)
@@LinusTechTips thanks for responding. Figured originally you guys were just seeing if it blowed up a pc for the video.. Which I don't blame yall its a good video idea lol.
I really love the chemistry between all of the LMG employees. It's like they've all been friends since childhood lol. Get yourself friends, colleagues and family that you can smack-talk and roast for fun, that's where true happiness is, in my opinion.
@@TheWunder it's all good, man. Everyone makes poor connections throughout their life. You'll find some friends you'll live and die for, in time. You just need to keep cutting the bad friends out. Don't let them convince you they have your best interest in mind.
Actually Japan has another quirky thing to consider.: half of the country uses 60 and the other half 50Hz on their 100Volts due different deliverers after the war and the infrastructure that has been built upon them, which are now not to be messed with anymore. Thats why there was a time when Japan had 2 versions of everything, just to be able to work in the part of the country that it is needed, nowadays most stuff usually supports both frequencies tho.
@@DamnedAngel96 Actually difference in frequency is a difference in "speed". Keeping the voltage the same, but changing the frequency can cause a 3 phase motor to spin faster. This in essence is a problem for all older type of devices like washing machines and frigdes that used pretty simple 3-phase motors to drive them. Difference between 60hz and 50hz is about 20% so it basically means that your fridge/washing machine either runs too fast and can be damaged because of 20% boost (if it runs on 60hz but was designed on 50hz). Or the other way it runs 20% slower and basically is less powerful in comparison to what is should be.
@@osopenowsstudio9175 the technical reason is because the electrical impedance of inductive and capacitive loads against alternating current is directly proportional to the frequency. This affects how much current is flowing through an AC circuit for a given load and affects how much power the resistive loads receive in the electrical network. A frequency mismatch can cause a light bulb to receive too much or too little current, for instance.
@@TheLucidDreamer12my man did not use a simple laymen term😭 he said he’s not an electrician Dawg💀 how is he gonna know what those words in sequence mean
The true difference with the silverstone is the cleanliness of the output signal, meaning no ripples on the volt lines. This helps with your lifespan of the products and puts less strain on the power circuitry of the other components.
Not really. You see, Intel defined voltage specs for PCI and they are pretty loose for todays standards. Nevertheless, everything that you install on MB (RAM; CPU, GPU etc ...) has to conform to these standards, therefore everything runs ok even on PSUs with lower tolerances. Simply, components expect certain ripples and are not damaged by them.
You need to ensure the Gnd lead is a little longer than the other two. This ensures that is the cable is pulled out the GND wire will disconnect from it's plug last.
Pretty sure they also reversed their polarity, and probably murdered the copper cabling with those wire snips when they were stripping it. If you are going to rewire a plug, definitely don't refer to this video for reference. 😂
@@Curt_Sampson It somewhat depends, industrial locations (where they shoot) don't use things like Ufer grounding and I think they in particular have multiple voltages and 2 and 3 phase outlets.
@@smalltime0 This is my point. If you're using two conductors to connect to 2-phase power (such as North American residential 240 V), there is no "polarity": both conductors are "hot." (I don't know what "Ufer" grounding is, but polarity is about hot vs. neutral, not about ground, which is a completely separate thing.)
8:42 That is not a MOV, it is a thermistor (NTC type) generally use to prevent inrush current (soft starter)...etc (NTC Type - Resistance is inversely proportional to temperature)....Conclusion of Linus: "Based on the temperature of inductor"😮💨😮💨😮💨 ...You guys need proper Electrical/Electronics/Instrumentation Engg in your team.
yeah.. that's a bit sad. They are not teaching but rather confusing more people. Same thing with the dead GPUs from ebay video where they were just bypassing MOSFETs. In most cases, the mosfet would be a switching component (as in part of a switching power supply) and not just a "relay" allowing current to pass. A GPU has no need to turn on some parts of its circuitry on demand.
Yea sometimes I question the EEs they hire. If your in product development you know there’s so many ppl from SI to PI to EMC to validate everything.. good times tho
"Never modify your extension cables, or work on these if you're not qualified, or just do anything we've done in this video so far" **Proceeds to make a tutorial step by step on how to do it🗿**
I sometimes wished to have (reputable) 240V only power supplys so we could get cheaper PSUs here in Europe. Yeah I know R&D and production are probably cheaper to only build one kine, but it seems very wasteful that all the PSUs are speced for 120V, which is a capability just utterly useless to most people over here.
I question why 240V plugs are not more common in datacenters in North America. You can get extra efficiency that way. We do have 240V plugs in the home: but they are normally restricted to the Stove and clothes dryer (with high current ratings like 40A/30A repectively). I suppose Level 2 car charging is also 240V.
@@jamesphillips2285 Well Datacenters often use something like 400V (very custom) or 240V (as seen the million dollar unboxing) AFAIK, but in homes (and maybe even in smaller Datacenters) it'd be hard to switch plugs because you'd have to have both sockets in a home for some years if not decades, otherwise most would probably switch to 240V (at least they should for efficiency), but yeah legacy makes that pretty hard... (Also you'd need to change those dangerous plugs if you don't want people to die, 240V packs a hell of a punch, the shock ahould be 4 times stronger) Fast car charging is DC btw.
Australia is also 240v. You find a lot of multi-volt stuff now, switch-mode power supplies have made various voltages/frequencies a non issue so only one needs to be made. It's not any cheaper to make a 240v only, and barely any efficiency difference now. If anything, wide voltage appliances(with a standard IEC plug) make buying items easier as you can shop anywhere and just swap your local power cable for your area.
@@lunchie80 well consumer power supplys don't do this, but in server you seem to often see that the PSUs have double the Power for 240V, so you could probably build a 400V regular PSU to go out to like 750W with 240V only (and that's what makes it cheaper), you might not even need to change much in the hardware design because of that, you probably only need to change the output side of things. (Also you don't really get PSUs with non EU plugs here, so that's pretty much a non-issue for consumers)
Well then you just generate extra waste and get rid of inter-compatibility, like imagine you're American and you move to somewhere in europe and power supply companies have made it where you only have 120v and 240v power supplies in the areas that use those, when they move to Europe or most anywhere else they have to buy a new one, and vice versa. Honestly we just really need a universal power standard but that won't happen for a long time, if ever.
8:15 NTC thermistors is used for inrush-current limiting. When the capacitors on the input side of the PSU are fully empty and the NTC is cool to the touch the NTC thermistor adds resistance to the AC circuit to gradually charge up the capacitors over a longer period of time instead of trying to charge them up very quickly all at once. As power starts to flow through the NTC thermistor it begins to heat up and the negative temperature coefficient (NTC) means as it heats up the resistance gets lower making the NTC thermistor look more like a direct wire in circuit instead of a resistor. So it might start at like 18 or 20 ohms but as it warms up it changes to less than 1 ohm over a fairly short period of time. It basically makes sure you don't blow the mains breaker when you first plug in the PSU...
It's a little frustrating that LTT has very high demands for hiring people in LAB, but these people end up knowing their job poorly. None of the people in the video could find out the markings of the mosfets and calculate the maximum available current, no one opened the datasheet for the transformer and сheck its maximum power.
As you are really knowledgeable about physics could you tell me how would one go around calculating V,I,R when two of these are given both in series and parallel. It would really help if you could tell me how to for example mathematically separate currents at the two resistors in parallel to compute their values when V and R are given. I have a test on Tuesday and would really appreciate the help. All 6 scenarios for series and parallel.
The probable reason the PSU case is getting hot: The internal transformer works at high frequency above 20,000 HZ and is working way above it's Ampereage capacity, as a result, it's High Frequency magnetic field expands beyond it's physical core structure, as a result, the AC magnetic fields bombard the external steel case, heating it like an induction cooker. I've seen the same phenomenon when a high frequency transformer is overdriven. The more you know. A few things to look for: The extension cord modified for 240 volt: I see a fire risk because the indicator light on the business end is now dissipating 4x the power. they are neon lamps with a series resistor. Unplug when not in use.
indeed. But considering 2000w? thats a lot lol, most parts now a days don't use much power. My intel nvidia system is prety beefy and still idles at 90w and medians at about 200-300w depending on game, on a old class corsair 750w supply*(one of the bests I ever owned, as I own several); hard to find now a days :( . My netbook is like 5-10watts lol. A good quality 500-750 w PSU goes a long way as they are prety strong, need one with good high amp rails for some cards/cpus, if you don't plan on rigging 2 or more video cards. Also, depending on heavyness, helps too.. CHeap psus don't weigh much. Good psus, weigh more which I find interesting.
I really can't understand why anyone would buy one of these PSU's. Spend thousands on a build with a 3090Ti and high end CPU etc, but can't spend $300-$400 on a quality 1200-1600w PSU, which is plenty of power for the build.
@@bongong1 Its fun to spend money on a badass GPU and a super fast CPU. Spending money on a metal box you will never look at past initial setup just isn't as fun. Even if it is a very important metal box.
@@bongong1 Plus people are on a budget, some*, if you are able to cut costs and invest in performance on other parts and risk, and it works out, money saved for some. I've done it myself too, but I was lucky to get a no name psu with heavy components which is a good thing, and lasted me a long time, no use for it tho, as its old; mainly only looked at amp rails for my old 780 ti back then.; but switched it out to another corsair later on. If going for a no name brand, always make sure for a lot of good reviews and look at the bad ones too. Sometimes they can be good, sometimes they're just bad.
@Khel yea But I don'T ever think that far ahead on my builds like super crazy high perm builds, usually just keep them to a min with the 80s/ti's , I think I gone down the list on my buiilds from 780s and climbed above.. Usually keep the watts low when I can. I don't think theres many that do, as they have a hard enough time to get more than 1 video card..
@@Mr.Morden I did a teardown/test on a super cheap AliExpress PSU a couple years ago. It was quite poorly constructed, but seemed to perform fairly well nonetheless. ruclips.net/video/pRafY7S3fKw/видео.html
Even short of that - anyone can afford some car headlights to use as a consistent controllable dummy load and i'm sure they have an oscilloscope to measure regulation and ripple.
Id love to see a video of all the prototype ltt screwdrivers that didn't make it. I think it would be interesting to go over all of the reasons they didn't make it in.
Japan uses 100VAC, which may mean slightly lower performance or slightly higher amp draw if North American appliances are used unmodified. Additionally, some of Japan runs on 60Hz (like NA) while some of Japan runs on 50Hz (like Europe). YMMV.
@@suporjustin it sure is. curiosity sure killed the cat. then the nickname he gave them. here come the expert : "we see here a lot of chunky bois" rotfl
7:42 That is not true. The point of a MOV is not meant to 'level out' the spikes. The point is that if an extraneous voltage spikes the MOV shorts, in turn triggering the fuse. Short term the fuse will not blow due to thermal inertia, but most over-voltage events are long enough to burn the fuse. This in turn protects the power supply and components after the fuse from damage. This is why you ALWAYS see the MOV after the fuse in the circuit. Actually without triggering the fuse a MOV would destroy itself extremely quickly as it cannot handle much power at all. It shorting a high voltage to ground with a low resistance would mean it needs to dump massive amounts of energy in a small time, hence it cannot be the main protection device. Sure it might work for short spikes, but it is not a reliable and safe way of doing things. Especially as MOVs tend to fail in short circuit mode, which means that they will burn and cause a fire hazard.
Where the fuck did they find that guy, isn't he like supposed to know shit about electronics? He was wrong about everything he has talked about in every video he's in
Can confirm, an unfused MOV is a lot more trouble than no MOV at all! I once connected a 120V power strip to a 240V source, not realizing it had MOVs inside it (without fuses). An enormous bang ensued, followed by smoke emanating from the power strip. The output of the power strip didn't even shut off.
@@DielectricVideos My power strip had 3 MOVs as crude over voltage protection and "filtering". In the middle of the night the MOV between live and neutral decided to commit suicide and went with a loud bang. It was on a regular european 230V 16A circuit too for extra spicyness. MOVs NEED a fuse, be it a normal one or a thermal fuse. When they fail, they mostly fail short. Also they tend to heat up quite a bit when they get tired. MOVs have a limited lifespan and can only absorb so many transients.
You guys should do collabs with actual electrical engineers who know what goes into power supplies to do side by side analyses like this. The size of a transformer for a given wattage and frequency is mostly the same regardless of voltages unless you're at very low or very high voltages. And PFC is necessary for anything at this power level regardless of voltage level. Weight difference could come from smaller filters on the AC side resulting in more EMI, smaller inductors and caps on the output meaning higher output ripple. It could also be that they used higher switching frequencies which would shrink weight and size a lot at the cost of efficiency which people are a lot less likely to notice
They do have actual electrical engineers. They just don't put in the time and effort to actually analyze anything cause being "probably correct" is all they need for a profitable video.
Help me understand why it was necessary to hack a NEMA 15R onto a power cable when you could have just used an actual 240V PDU with a standard C13/C14 connector. The C13/C14 is rated for 240V use and you could have used the opportunity to actually give some tech tips about different power connectors that typically only exist in the datacenter rather than "really bad idea" hack jobs.
If they were going to hack it, it would even have set a better example to put the NEMA 15R onto the C14, then use a 240V extension cable rather than making a "spicy" one.
@@BobHannent A C14 is a computer inlet and a 5-15R is a North American outlet. A cable with both of these wouldn't have helped. I think what you want to say is a NEMA 6-whateverP inlet plug on one end and a C13 outlet on the PC end. For their particular setup I believe they were using an L6-20P plug. In datacenters L6-30P plugs and L6-30R receptacles are more common.
OMG LTT sometimes pisses me off so much. Like they literally said during the video that just because it is running doesn’t mean that the PSU is adequate. And they do the same thing. Ending up sort of recommending this trash PSU that will burn itself off if running for too long. They ran it for like what 10 minutes? The testing they made is not enough for the conclusion they made
I love them,but yes,this thime they did a mistake. It is important to watch ripple for components,stress test and "long" time stress test,BUT they didn't reccomend this. In fact they multiple times said "Wow,it's just awesome how it didn't exploded.". So don't say that they reccomend this.
@@0xbadcafe You know,it isn't wrong at all,I found almost all of their videos interesting. But someone can mistake theit words,as I said,they didn't reccomend these.
That explains something lol I worked with a decent backpack vacuum with a 50 feet cable which I just unplug from the outlet and I didn’t turn it off before and it shook me I grab it
Why, that is as it should be. Germany has 240V as standard in their homes the US has not. So you label in the language of your target market if you want to sell there.
@@bachmed00 I started wondering - how do American use hair dryers and such? I have a hair dryer that's 2400 watts, while average seem to be around the 2kW mark.
@@DrakkarCalethiel Damn, women must take even longer to get ready over there. Do appliances automatically lower their draw or they’re specifically made for the US market at lower power? I’ve never thought about this being an issue anywhere, new things to learn every day.
Jeez you guys, as someone who repairs switch mode and linear power supplies and inverters I noticed you got so many things wrong about the design/topology of the circuits inside these supplies that maybe you should have edited out the 'critique' of the interior completely. First, you highlighted the secondary output filter stage in the video, not the input EMI filter stage. Second, "NTC" = Negative Temperature Coefficient, that would be an inrush current limiting thermistor, not a MOV (as a side note, the cheaper power supply has no MOVs that I can see, and is likely just using spark gaps on the bottom of the board). NTC thermistors limit inrush current on startup and are then generally bypassed with a relay, MOVs shunt high voltage transients to neutral/ground to protect the circuit. Third, nothing wrong with touching a transformer that's not powered, they don't hold a charge. As far as why the Silverstone power supply is heavier. First, both of these power supplies have EMI filters (the Silverstone has multi-staged EMI filtering) and both have APFC (Active Power Factor Correction) circuits, on the cheap power supply you can see the large APFC boost converter inductor next to the main input caps. So stating that the cheaper power supply is lighter because it's missing the APFC circuit is wrong. Second, the cheap power supply is likely a half bridge or a full bridge / forward conversion topology and an older design. The Silverstone is a more modern LLC resonant converter design combined likely with a full bridge, which means it's using a series of inductors and resonant capacitors to filter, shape, and generate the drive signal after the switching FETs. You'll still have a main switching transformer, but you will also have large inductors in this resonant circuit, as well as the APFC inductor, secondary output filter inductors (all of these inductors look like transformers), a standby transformer, gate drive transformers, etc. Third, the modular design on the Silverstone is going to add weight, as it requires another board and more hardware. Fourth, the Silverstone has far more discrete secondary DC/DC conversion components and filtering as it is likely using synchronous rectification - that is, MOSFETs are being driven on the secondary side by a separate controller IC and are being used to "emulate" what schottky diodes would normally be doing on cheaper power supplies. This is a much higher efficiency design but it requires more components, increases complexity, and increases the BOM cost. Fifth, this power supply is undoubtedly using real copper everywhere. Aside from all this, there is a lot more but you get the idea. Believe it or not, but cheap generic power supplies like the one in this video sometimes don't even use copper at all, and will instead use aluminum that is coated to look like copper. This means the wires, inductors, transformers, nearly everything will be aluminum, as it is cheaper. This is not good, as it is not as good a conductor as copper, has somewhat higher resistance and different impedance characteristics, so it generates more heat under higher current loads (particularly with inductors as aluminum's magnetic field saturates much faster). If these cheap power supplies do use copper, they will use as little as possible. Lastly, a bit of a nitpick but Alex said "I'm going to take a couple of guesses as to why our Chinese power supply is so much cheaper..." Just an FYI but virtually ALL ATX power supplies are made in China, even the expensive Silverstone power supply you have there. Silverstone likely contracted Seasonic to design and manufacture that power supply, and all Seasonic power supplies are made in China, even their high end models. People really need to get away from this mentality that China = cheap junk. It's ridiculous and ignorant.
Nice going into the details, I was grinding my teeth at multiple intervals when they talked about stuff they didn't know. Small transformers won't hold a charge because the stray capacitance is negligible, however HV transformers must be put to ground, otherwise you'd probs die.
Fun video as always but it was a bit tough watching the analysis of the supply insides, those ntc thermistors are for inrush current and are not MOVs, that yellow tvr was likely an actual varistor. I'm not an engineer anyways, and I get that a detailed explanation of the different topologies between the two supplies is out of the scope of this channel.
Yup, and talking about the 240/120v switch: there's actually very little extra hardware. The switch turns the bridge rectifier and input capacitors very neatly into a voltage doubler. The talk about additional transformers was all wrong
@James Hogge Yeah the discussion about the transformers was pretty hand wavy, those things are proper insulated so just touching the top of them isn't going to do any harm. They also aren't made of magnets, unless you're very loosely referring to ferrous materials. If I had to have a guess I'd assume each transformer was for a separate rail, or maybe even something esoteric like a multiphase full bridge/half bridge converter considering the power density.
@@jameshogge No.. Actually not... Those Switch Equipped PSUs are too crap and old designed Half Bridge Converter.. They tend to fail more than.. modern Dual switch Forward and Resonance LLC PSUs.. In modern PSUs.. The APFC Circuit actually Boosts Voltage for primary Capacitors.. to like 350 volts... And those extra transformers in that PSU.. we can't say about them much .. because.. they can be connected in many many ways .. like 2 in. Series.. or both in parallel of Primary series and secondary parallel.. or vice versa.. there are many possibilities... For transformer configuration for load sharing in PSUs...
As far as I know, US and Canada use white for the neutral and the black is line (hot). For a 240v system, the L1 would be black and the L2 would be red.
I love how they arbitrarily labeled it with 95 Plus Gold because 95 > 80 therefore better; but not 100, of course, because that would just be silly.
who knew a chinese knockoff brand could be so humble and not go all the way..!
Well, since it's about efficiency, at least they know you can't have 100% efficiency in a power supply, lmao
110 platinum psu: with a stirling engine inside that generates extra power from excess heat
No PSU can be 100% efficient, So at least they got that right lol
@@AdrianOkay 100% efficient means no excess heat :P
David: "You have life insurance right?"
Dell: "Yes, We sold him multiple warranties"
Yessss
Surprised he wasted money on a policy given how financially secure Linus is already
@@user-op8fg3ny3j Life insurance is to protect your earning potential, not your current holdings. It covers what he would have brought home to his family for the remainder of his career.
comment of the day
so, if youre Linus breaks, you can just return him and he will be fixed
(imagine indian female voice)
The "Warnung" is the actual German word for "warning." You can tell it's meant to be one of those multi-language labels because of the Spanish "peligro" below it and the French "attention" to the lower-left. The issue is they didn't put a single other German word on it.
I was thinking it was probably a multi lingual thing
Yes, the warning in English is right beside it on the left. No typo there
I think it was a type issue because I don‘t think that Linus can speak German
You would think that people from a bilingual country would understand that.
Thats why i clicked the Video in the first place... wanted to know why they put a german word in the thumbnail.
You can tell Kyle is an engineer by the way he refers to parts. Also the bit about why he hasn't sent a product yet hits home.
I love how the least sketchy part of this video is probably the 2000W power supply itself
No, because I would have taken a 240 V extention cable and modded it with a 120 V female socket, not the other way around.
truth. why didn't they just use the pdu from the million dollar server?
Why you are so scared of 240V?
@@jackielinde7568 why? Wouldn't that be rated to a lower current?
@@NikolasOldSchool because North American electric infrastructure is unsafe at 120 volt.
I miss these types of "Don't ever do anything you see in this video, but here's some detailed instructions on how to do it" videos. It reminds me of an old video where Linus showed us how to make our own 7v fan speed reducer out of extra molex adapters.
Yeah use 5v for netative an 12v for postive so you have 7v
If you dig into the 20/24pin connector, you can also find -5v and -12v to play with, giving you a voltage choice of 5, 7, 10, 12, 17, or 24 volts to play with
If you also use the +3.3v line, you have 1.7, 3.3, 5, 7, 8.3, 8.7, 12, 15.3, 17 and 24 volts to play with
@@MrHack4never cool! ........why would I want this? Not being snarky I have no idea what this would ever do for me
@@RedBeardWalking
You can use 24v to fry your fans😃
Linus did WHAT?
I test car and home amplifiers to show their actual power output because this has gotten so out of hand! Many use “MAX” ratings we call “ILS” ratings (if lightening strikes) 😬
Big D in the house. Or is it diriculous
Even for reputable brands? Because I mean if you buy a 5000W amp from some chinese seller for 30 bucks you can be sure it won't even reach that. It's like these 5 TB USB sticks from wish. But I doubt Yamaha would lie about the output.
@@KiinaSu years ago reputable manufacturers Kenwood, Alpine, Pioneer, JVC, Sony, and Panasonic claimed double the wattage for peak envelope power or pep. I believe it was jenson that started the max power. And if you're old enough you'll remember Roadmaster they was the worst
@@minenachos But reputable manufacturers had still the sinus Wattage somewhere written down. At least here in Germany (we have great consumer laws which sometime enforce such comparable moves, don't know if it was enforced.)
Dewalt's drills are/were branded "20v MAX"... that was not saying they are 20v tools, they are 18v tools with a surge draw of 20v max... they actually had to change the branding in some places (aus if memory serves)
In three wire 220/240 volt(or four wire for that matter) where the two hots go doesn't matter since they are completely opposite phases and are indistinguishable on the device side, it also doesn't have a neutral because it creates a phantom neutral at the center point of the two phases
Ground on the other hand is absolutely required. Terms neutral and ground are often mixed up in everyday speech.
@@TealJoshbecause in North America they are often the same thing when you're dealing with 120 volt outlets (don't worry about it. It's confusing and stupid)
13:35 is one of the best jokes this channel has ever seen
That spooked me
True HAHAHA
Omg lol I actually laughed out loud
i loved that.
I freakin jumped 🤦♂️
It’s funny that PSU testing setup for 6160 USD was missing the device measuring power draw for 30 USD.
@reconz 82299 you dont know work/pain unless youre hammering a nail with a rock xD
They would’ve needed a clamp amperage meter on each of the hot legs because those kilowatt power meters I think only work on 120 V if they plug that into their modified extension cord they would fry it
Alex: "Don't touch these"
Kyle: *immediate physical contact*
@@BlueHound Unless the PS was connected to power I can think of no way a transformer could possible injure someone (other than a possibly sharp edge or something pointy sticking out of them).
Also Linus seems to think Transformers have magnets...since when do transformers have magnets in them?
They stated early on that both PSUs had been powered off for over a year so we're safe to touch. Normally you wouldn't want to touch as the capacitors could still hold a charge
Like they are propably safe after a few weeks, they are 99,99999% safe after a few month, that being said. Don't touch them they could theoretically still hold a charge but you know, they propably dont
Alex: CYA statement
Kyle: I know how long they have been on the shelf.
These are just some caps. Yeah you would get a shock like in the order of magnitude of an electric fence. But not really dangerous
I think I would've just made a resistor out of nichrome heater elements to test rather than plug it into all that juicy hardware.
But that's not entertaining or suspenseful. While it makes for a better test, this makes for better TV(Or RUclips, whatever you want to consider it.)
I mean, they bought a load test center, so honestly they probably put it on that before actually risking all that hardware.
@@TotalDbag24 I mean, I said "I think I would've"
I'd love to see Gamers Nexus put this thing on their power supply tester
This is exactly the thing that I was thinking.
Why risk good or even decent components when you have a testing unit that can stress test, and survive any power supply jankness that ensues?
Like...mosfets explody?
Was about to comment that.
@@AC3handle because LTT does it the "fun" way and GN does it the legit way
Yeah send it over to them!
Was thinking the same thing. Would've loved to know the actual efficiency rating.
okay, I actually jumped at the point where they pranked Linus when he put his head against the PSU.
Send this to GN as a gift to see if they can blow it up with their tester.
Me too. My slow af brain was like wait what, why is he smiling
Yes, having actual professionals test it sounds like an idea Linus would never entertain though.
I'm happy to see I was not the only one.
@@zector0 yeah, a testing lab would be a stupid idea
Yeah, it scared the heck out of me too XD
"Warnung" is "Warning" in German, they just wrote it there in different languages, not a spelling error.
Came here for this. I first thought that youtube now started translating the thumbnails.
@@gerritaddiks5098 Same lol
But they still didn't put the actual warning text there in German, like they did for the other languages lol
@@HerrSeelenflug They translated "warning" and then they got scared of German grammar 😂.
I thought that was "Achtung"?
i love how they treat the 240 v cable like high tension or something, when almost everywhere in the world you use it to power your blender at home.
They treat it like that because its a ghetto style contraption
Watch what happens when you put a toaster meant for 120v on 240v. The issue isn't necessarily that 240v is dangerous (though technically it is) but that this is thorough misuse of cabling which creates an inherent feeling of risk since it can overheat, melt, catch fire, short, etc etc.
@@Fenriswaffle yeah but they use high tension cable (used to power 480v or higher stuff) to power up a simple machine.
@@ChilenonetoRUclips Because the cable should always be able to handle more load than the breaker, and I'm assuming they don't use the little 12 or 16A breakers for their 240V circuits ther like we do in Europe. So the current could be a LOT higher, hence the bigger cables for these systems. Obviously that cable was oversized for the PC, but not for the breaker.
@@Fenriswaffle It's all about idiot proofing stuff when it comes to electric codes, and these are idiots :P
I'm sure you know this, but Warnung is simply the German version of warning. It even has the correct English spelling just to the left of it
Never knew that
its ACHTUNG in german...
oh wait it was a joke... dumb me.
@@lordrefrigeratorintercoole288 no, Warnung is the german word for warning. No joke here. „Achtung!“ is like „Attention!“…
@@lordrefrigeratorintercoole288 Dumm? xD
@@iamlookto Yes.
I can't wait for my 99 minus palladium 4000W power supply for $15
Lmao right
Hey collin
Overpriced
The pfp tho🤮🤮🤢
Not enough that he's a furry,he's aleo gay😂
@@StefanellNahuia OwO
If Alex is there, you know something is going to be very questionable in terms of if it’ll work. That said, 2000W may be more needed at the rate CPU & GPU power consumption rates are increasing at.
Pretty sure if you'll want a Rtx 4090 the bare minimum will be 1300w, seeing how much the 3090ti consumes and rumors saying it will only get worse
That's an understatement. At the rate we're going we will need electricians to install a dedicated circuit for the computer. Not to mention a second air conditioner for the gaming room.
We are at a time when we need to work on efficiency (climate change and oil prices) and those companies are just going backwards. People should boycott those extremely inefficient GPUs but who am I kidding.
next generation is the last one these criminal chipmakers are gonna get away with inefficiency
@@thunderarch5951 cpus won't take more than 250 at the max, rest of the computer maybe 150, that's 400, max load, with the 4090ti being around 500 watts. 1000 is fine
15:55
not all cables are actually copper, especially in cheap PSUs. Some use copper clad aluminum, or even just straight up aluminum
Alex: Dont touch the transformers!
Kyle: Proceeds to casually touch them 60 seconds later
I presume that this warning would be more important after the equipment has been energized.
Considering that he is an eletric engineer, he probably knew that he PSU had been off the grid for over a year and so its safe to touch. The warning was more for casuals like us, because if you touch does a day after you used it, you are gonna die
He's definitely a mechanical engineering btw, it is not the transformer but the capacitors that are dangerous.
@@gamm8939 I have taken electric shocks from PSU's like that countles times. I never learn. Long as the current doesnt get through your heart or other organs you are fine. Mostly my fingers have got some nice jolt of electricity, i wear rubber work boots and im careful to not touch with second hand to something else when im checking things. I yesterday got such jolt from TV's psu because i touched wrong component accidentally, it was plugged to wall when diagnosing. So no you are not going to die if you are not touching something else same time or if floor doesnt conduct electricity
Transformers are harmless without a wave going in and they are isolated. The underside of the pcb is dangerous with the high voltage caps
Alex is like the only one there that just spends linus's money on anything and linus just eats it up..
Alex is by far the most intelligent, most knowledgeable person there.
That's why.
He just cannot speak like Anthony.
Brandon's been there for more than a decade. They probably have over a million CAD in camera/video shooting equipment alone.
@@nexxusty well no lt really Alex's intelligence is based more on engineering and physical things, Anthony's a tech wizard, on the other hand.
@@sxndwich3395 I would literally trust Anthony to do anything and succeed. My best friend it's like a copy of Anthony and he can't even burn food. It's impossible to him to fail. I love both Alex and Anthony tho. I just really think people underestimate Anthony but 7 bet Linus knows exactly what he hired when he hired Anthony. #Anthonysquad
@@sxndwich3395 Anthony doesn't know any more than Alex does, and I honestly don't know why you think that.
Insurers: "Couldn't you have just shipped this to Tech Jesus to test with that fancy PSU load tester of theirs and done a collab?"
Yep my first thought was like man this would be a lot safer if they borrowed Tech Jesus's equipment. But that'd possibly get less views...people like danger.
I've been asking Steve to test these for a year now.
@@KillaBitz And Linus took a year to remember them having one to test.
@Linus Tech Tips -
You would be much saver when fixing a German / Korean style (recessed earthed) outlet to the output of your modified cable , because Germany has 230 Volts ( + 16 Amps) & there are plenty o IEC computer power supply cables for German / Korean outlets ... the 2x 110 Volts in Canada / USA are no problem at all because the German plug / outlet is not polarized anyway & some regions use 2x 110 Volts with German style outlets (50 or 60 Hz) ... AND don't forget to crimp the fine strands of the flex !
Also the German / Koren system does not let you touch live contacts (in opposite to the literally shocking Canada / USA system) ...
Trust me I know what I tell you , I'm a German & I did serval plugs / outlets my self & even connected a 3 phase stove ( 400 Volts) without ANY incidents over the years
If you have half a brain and know how to read a basic wiring diagram neither of those are that hard, now if you're doing it live that's when you need some more finesse
"Do NOT ever do anything we've done in this video. That being said, here's HOW you do it." These guys know that people are morons and want you to at LEAST know how to properly do something stupid BEFORE they go and hurt themselves. How responsible!
Because some people will definitely do this and its better if they do it right
Morons will moron. Best thing to do is to moron responsibly
@@swapnilchaudhary2944 l
Though they could have just taken a little extra effort to do it right in the first place, and also replaced the NEMA 5-15 outlet with an IEC C13 outlet (that plugs directly into the PSU), avoiding ever having 240 V power on a 120 V outlet.
Even easier yet, as well as more flexible, would just be to buy a North American 240 V extension cord and put their 240 V connector directly on the IEC cord, so you'd still have just one plug to replace and it would be utterly clear (because of the short cable length) that the IEC cable was 240 V.
Well there is too many people on earth so whats a couple of morons 🤣
NVIDIA is probably like "eh, who's gonna have 2 3090s when you only need 1 3090TI" and proceeded to have the most smartest dumb engineers.
spelling mistake : you dont need to more
@@OOFERenjoy fun fact : no one cares
@@OOFERenjoy spelling mistake: you dont add spaces before :, ;, ,, ., ?, !, /, -
@@OOFERenjoy there are no spelling errors in op's comment.
@@BeetleBuns "most smartest" more like "smartest" you boomer dont know spelling huh? go back to grade 1
I wanna see GN test this with their proper testing equipment
This needs to happen, I wanna see that puppy put to its max and maybe put out the magic smoke like our good old Gigabyte PSUs.
THIS !!! :D
@@DrakkarCalethiel The smoke will be accompanied by a big bang and shrapnel. Maybe even a fireball or plasmaball O.o
@@Ormathon I hope that it blows the gigabyte PSUs out of the water when it fails, pun intended. :D Would be great to watch if one of the main switching FETs would completely grenade the entire board when blowing up.
This is a fast food channel, check gamers nexus for indept stuff
Oh man, you missed out on checking the power draw .. the biggest claim is the 95% efficiency and you ignored it :(
"Do not repeat this at home!" Proceeds to give a detailed instruction on how to do it at home
“Yes, this gunpowder recipe is the real deal.”
"Warnung" is german for warning so this is probably not even a mistake.
The only problem is they forgot to put a German warning under it 😆
Had to scroll too far for this comment :D Thank you
Linus and Alex: Never do this because safety.
Alex 10 seconds later: Here is how to do it
😂
Reminds me of my dad: "Son, this is a bad idea, you should never do this. Now hand me the wire strippers so I can do it."
If you don't know exactly what not to do, you could do it accidentally.
They should have cut out the whole part about making the cable and not shown the plug. That's better than saying "don't ever do this" and then show step by step how to do it.
Which is why I COMPLETELY disagree. THIS is exactly what Louis Rossmann complains about, the culture of ownership and repairing your own things yourself is dying because you are obsessed with safety, even with something as EXTREMELY simple as an extension cord
@@PippetWhippet obviously, because my hands grow out of the correct spot and i actually can fix home appliances myself. and i live in a country with 220v standard.
I know this is childlish but 13:22-
Linus knew what he doing there being funny that it
15:00 you should have a power meter in the outlet to sensor the power pulled from the wall!
They also should have shown us the temp on that back panel they have a thermo camera, meh .
Also just send it the GN to blow it up
@@09f9 An imported one could be both fairly cheap and 220V. True it would have needed a corresponding power socket and IEC lead from a 220/240V country too. That wouldn't be a bad idea though, no need for the sketchy warning label to indicate the voltage.
Yes then he could measure efficiency 😁
@@mlw19mlw91 He could calculate the power drawn by the computer, if he knew the efficiency of the power supply. As i understand they are estimating the power consumption of the computer... They have no clue if the power supply can out put 2 kilo watt. If they knew the power draw than they could calculate the efficiency, YES!
I really want to see Steve at Gamers Nexus hook this thing up to his test equipment.
This needs to be Patrick Stoned indeed.
@@walkir2662 wait, Patrick is stoned?
Or better yet, Aris from Hardware Busters.
Linus having a scale with his own meme face on it just screams Linus.
Imagine working there and almost every tool you are given to do your job has your bosses face on it. lmao
I think dbrand shipped them a lot of their Linus meme face stickers... Like a dbrand level of "a lot".
They wrote WARNUNG because it's German made quality.
The wattage checks out (they just added it wrong), according to the label:
3.3vdc × 25 amps = 82.5watts
5vdc × 25 amps = 125 watts
12vdc ×150 amps = 1800 watts
12vdc × 0.5 amps = 6 watts
5vdc × 2 amps = 10 watts
all together thats 2023.5 watts
I think the 3.3V and 5V rails together are not supposed to exceed a combined 150 watts and that is why they are stuck together in the table. It is a quirk of how some multi-rail power supplies are designed, usually because there is a tap on a secondary winding of the transformer that causes this where if they were separate secondary windings altogether it would not have that limitation. That leaves 150 + 1800 + 6 + 10 = 1966 watts total which is close enough. They may have just mislabeled the 12v rail.
@KABAKOKSEK Often times consumer PSUs are built to offer options on how you want to distribute the total wattage. Each rail is separately able to support higher wattage, but there is a tighter limit on how much they can add up together.
This means that the beefiest components (AC side) can be built to lower spec, which lowers cost.
@@10100rsn Still, the label has an incorrect result for the +12V rail. The PSU wouldn't reach 2000W but it's close.
As you are really knowledgeable about physics could you tell me how would one go around calculating V,I,R when two of these are given both in series and parallel. It would really help if you could tell me how to for example mathematically separate currents at the two resistors in parallel to compute their values when V and R are given. I have a test on Tuesday and would really appreciate the help. All 6 scenarios for series and parallel.
@@skyemperor2357 since you are already on youtube, there are tons of videos about ohm's law that are great and would surely teach you the simple concept albeit hard to imagine for beginners. Also, your question is a bit broad and unclear. This comment is also not talking about resistance, but power. Goodluck to your exam.
Linus and Alex executing on half-baked video ideas is by far my favorite video concept.
"Don't touch these"
*electrical expert touches them*.....
On a serious note, they aren't stressing it enough in the video and explaining why it's so dangerous to open a power supply. The caps can hold charge long after being unplugged! It literally can kill you folks! Same goes for appliances like a microwave.
Makes sense, since the electrical expert knows what he's doing and the average viewer does not.
What you say is true, but it's also true that most reputable power supplies have bleeder resistors across their large caps, so they will be completely safe within a few minutes, worst case. So, the Silverstone, probably perfectly fine. The other one. Who knows. If they copied a Great Wall, and didn't skip those components to save a few cents, maybe.
@@iClone101 lol, he really didnt
go watch electroboom.
electricity through the body is only dangerous if it passes through the heart.
@@niky00045 Pretty much true, but it is also possible to stop your heart with the energy stored in a cap, especially a large one. Just depends on the path the electricity takes as it flows through your body. That's why TV repairmen often worked with one hand behind their back - to try to prevent any shocks from flowing through their heart.
In all reality, if Intel and Nvidia can't get their power efficiency under control, we may actually see a need for 220v PSUs to handle more than 1800w.
they did with the 40 series!!!!
@8:35 "NTC" stands for negative temperature coefficient, these devices are used for inrush limiting. When you first plug the power supply in all those caps will be charged, and without that NTC resister it can blow fuses or breakers.
i mean it could be used for temperature measurement, but inrush limitting probably makes a bit more sense
TIL
SHODAN be praised!
@@ald3nt3 For temperature measurement, way higher resistance NTCs are more convenient, of the order of 10k
@@rexsceleratorum1632
Yeah you're right, just checked the datasheed, it has indeed an R25 of 5Ohm (and like 145mOhm at standard operation).
Should ship that to GN and have them do a full a test suite on it.
Jup im very confident that tech Jesus can get that thing to blow up, or at least give it an award.
I've been asking Steve to look at these for a year now.
Yes they should
I mean their equipment can test any psu's claims of being a certain wattage
So it WILL see if it can run 2000 watts
@@Ocastia the "somehow not as bad as Gigabyte" award
@@plazasta it could conceivably get that award, however I don't know if it could get the: "better than Dell" award, because that's the only place where Dell doesn't suck as much as they usually do.
Still a very low bar.
I feel like a better method of hitting that 2000 watts may have just been to use it as intended. With some risers, and like 8 low end cards mining, you could easily hit a higher power draw. I understand not wanting to risk high end hardware, but surely they could use a bunch of old RX cards at least. I was curious when it would stop working and if it could actually deliver 2000w. Sometimes PSU companies will list a peak rating and not sustained. Also I would have loved to see a Kill-A-Watt or something like it with a real wattage read out. Would love to see a revisit someday.
Obviously it probably isn't a good idea to use something like this, but it would be cool to know that 2000 watt ATX power supplies exist for ~$150.
Yeah I was expecting the same thing. Just use mining software to push the wattage limits, it's so easy to versus the trouble he was having running benchmarks on individual cards at the same time.
Also it's probably only useful in countries where power is free for the individual, considering how power inefficient that thing would be and how much profit you'd end up losing to electricity bills.
@@iClone101 certain regions in china has very cheap electricity, and are often chosen as mining sites before the legality shifts. i've heard electricity as low as 5 cents per kilowatt. some miners simply build water dams to power their mines. electrical cost is almost negligible for eth mining.
Much simpler way would be some old school halogen car headlights
Kyle: *points out the tool cabinets full of tools*
Alex and Linus: *still yolo with whatever tool is closest to their hands*
Power in Japan is much more messed up. They run at 100v Ac but the east and west run a different frequencies (50/60 hz). This can mess up motors or time keeping equipment built for the other frequency and require huge height voltage dc interconnects to merge the different grids.
Wtf why
Not to mention that 100V and 50Hz is pretty much the worst combination for operating single-phase rectifier loads... Lowest possible voltage and longest interval between capacitor re-charges.
@@knislappen iirc it's due to post-ww2 aid in rebuilding infrastructure - one side adopted 50hz (German system) and the other 60hz (US system). i don't remember the specifics but it's related to who aided and also the country being occupied postwar
we use 220V 60Hz and 110V 60Hz.
so it's double the fun.
@@DielectricVideos NEW York 25 HZ power just entered chat
13:35 Whoever did that should get a bonus or something, that was gold!
I almost fell out of my chair when then happened
A moment of tru fear.
got actually scared there..!
That's how you make an electrician throw whatever he is holding across the room. Hilarious stuff 😁
I jumped and my heart rate when up! LOL
1:23 "A Warnung" is actually kinda funny, cause Warnung means warning in German
the 13:36 "hey stop" i felt that lmao
1:35 in German "Warning" is called "Warnung"
You could risk $6,000 in gaming equipment.
Or you could just let Gamers Nexus do it with the proper power supply testing equipment.
yeah there is equipment to test volts and watts for f sake... buut LTT has to do stuff sensational for views... (dont get me wrong I love these guys but still lol)
We've had a proper PSU tester on order for a couple months but with supply shortages it won't arrive anytime soon. -AC
@@LinusTechTips Meanwhile you could send it to Gamers Nexus and let them do the testing
@@LinusTechTips thanks for responding.
Figured originally you guys were just seeing if it blowed up a pc for the video..
Which I don't blame yall its a good video idea lol.
10:30 “don’t ever do this, but if you do here’s how you do it.” Ok there Valve!
I really love the chemistry between all of the LMG employees. It's like they've all been friends since childhood lol.
Get yourself friends, colleagues and family that you can smack-talk and roast for fun, that's where true happiness is, in my opinion.
My friends always tend to leave when I run out of cash.
@@TheWunder it's all good, man. Everyone makes poor connections throughout their life. You'll find some friends you'll live and die for, in time. You just need to keep cutting the bad friends out. Don't let them convince you they have your best interest in mind.
Actually Japan has another quirky thing to consider.: half of the country uses 60 and the other half 50Hz on their 100Volts due different deliverers after the war and the infrastructure that has been built upon them, which are now not to be messed with anymore.
Thats why there was a time when Japan had 2 versions of everything, just to be able to work in the part of the country that it is needed, nowadays most stuff usually supports both frequencies tho.
Can you explain why different frequency need different device tu use it?, I'm not an electrician but I'm curious
@@osopenowsstudio9175 not an electrician myself, but might be the same for 100V or 120V, needs a different transformation for each one
@@DamnedAngel96 Actually difference in frequency is a difference in "speed". Keeping the voltage the same, but changing the frequency can cause a 3 phase motor to spin faster. This in essence is a problem for all older type of devices like washing machines and frigdes that used pretty simple 3-phase motors to drive them. Difference between 60hz and 50hz is about 20% so it basically means that your fridge/washing machine either runs too fast and can be damaged because of 20% boost (if it runs on 60hz but was designed on 50hz). Or the other way it runs 20% slower and basically is less powerful in comparison to what is should be.
@@osopenowsstudio9175 the technical reason is because the electrical impedance of inductive and capacitive loads against alternating current is directly proportional to the frequency. This affects how much current is flowing through an AC circuit for a given load and affects how much power the resistive loads receive in the electrical network. A frequency mismatch can cause a light bulb to receive too much or too little current, for instance.
@@TheLucidDreamer12my man did not use a simple laymen term😭 he said he’s not an electrician Dawg💀 how is he gonna know what those words in sequence mean
13:35 I literally thought something popped when he held it to its head , I jumped lmao
I'm really enjoying Kyle and Alex, they have really good chemistry and when linus is around it's the angel and devil on his shoulders
You should buy professional load equipment, it can be controlled digitally, measure voltage, etc. It is way better than a regular PC with two GPUs.
They used the cheap label so it can be easily removed to hide your sketchy power supply.
Given the amount of time (and solvent) I spend removing stubborn labels from things, that label was great! :D
That was a peel, not a label anyway
These bots are dumb as fuck.
The true difference with the silverstone is the cleanliness of the output signal, meaning no ripples on the volt lines. This helps with your lifespan of the products and puts less strain on the power circuitry of the other components.
It would be cool if they could hook up an osciloscope and show the signals. Could be another great electroboom collab.
It's also important with system stability, especially when overclocking.
psu reviews really need to look at the power quality on an oscilloscope, both idle and under load.
Not really. You see, Intel defined voltage specs for PCI and they are pretty loose for todays standards. Nevertheless, everything that you install on MB (RAM; CPU, GPU etc ...) has to conform to these standards, therefore everything runs ok even on PSUs with lower tolerances. Simply, components expect certain ripples and are not damaged by them.
No ripple I don't think is likely. Very low is probably more realistic.
You need to ensure the Gnd lead is a little longer than the other two. This ensures that is the cable is pulled out the GND wire will disconnect from it's plug last.
Furthermore they forget to use wire ferrules.
Pretty sure they also reversed their polarity, and probably murdered the copper cabling with those wire snips when they were stripping it. If you are going to rewire a plug, definitely don't refer to this video for reference. 😂
@@r00234 What polarity? North American 240 V is delivered as two 120 V "hot" conductors, one 180° out of phase with the other.
@@Curt_Sampson It somewhat depends, industrial locations (where they shoot) don't use things like Ufer grounding and I think they in particular have multiple voltages and 2 and 3 phase outlets.
@@smalltime0 This is my point. If you're using two conductors to connect to 2-phase power (such as North American residential 240 V), there is no "polarity": both conductors are "hot." (I don't know what "Ufer" grounding is, but polarity is about hot vs. neutral, not about ground, which is a completely separate thing.)
00:13 I open the video and am instantly greeted by Linus dangling a $550 Power supply by a ripped piece of cardboard 5 feet off the ground
I am pretty sure you know that "Warnung" is German for "Warning", which you can read next to each other. But anyway, very good video.
Which would make sense since its a 230V/240V power supply
Can't tell if LTT was joking or they've never seen German before
Was already wondering why there is German instad pf english on the thumbnail.
@@user-op8fg3ny3j Ich mein Warnung ist ja auch nur ein Wort der deutschen Sprache... er muss ja nicht jedes einzelne Wort kennen 😂
"Let's get an expert to tell everyone what's going on"
"Here we have a lot of chonky bois"
Spoken like a true expert.
The "expert" has no clue whatsoever. He thought an NTC, labeled an NTC, was a MOV. He's never heard of NTCs apparently
8:42 That is not a MOV, it is a thermistor (NTC type) generally use to prevent inrush current (soft starter)...etc (NTC Type - Resistance is inversely proportional to temperature)....Conclusion of Linus: "Based on the temperature of inductor"😮💨😮💨😮💨 ...You guys need proper Electrical/Electronics/Instrumentation Engg in your team.
Yeah, normally I enjoy LTT antics but this particular Video was just too cowboy for someone who knows even the basics of electronics
yeah.. that's a bit sad. They are not teaching but rather confusing more people. Same thing with the dead GPUs from ebay video where they were just bypassing MOSFETs. In most cases, the mosfet would be a switching component (as in part of a switching power supply) and not just a "relay" allowing current to pass. A GPU has no need to turn on some parts of its circuitry on demand.
Yea sometimes I question the EEs they hire. If your in product development you know there’s so many ppl from SI to PI to EMC to validate everything.. good times tho
"Never modify your extension cables, or work on these if you're not qualified, or just do anything we've done in this video so far"
**Proceeds to make a tutorial step by step on how to do it🗿**
I sometimes wished to have (reputable) 240V only power supplys so we could get cheaper PSUs here in Europe. Yeah I know R&D and production are probably cheaper to only build one kine, but it seems very wasteful that all the PSUs are speced for 120V, which is a capability just utterly useless to most people over here.
I question why 240V plugs are not more common in datacenters in North America. You can get extra efficiency that way.
We do have 240V plugs in the home: but they are normally restricted to the Stove and clothes dryer (with high current ratings like 40A/30A repectively). I suppose Level 2 car charging is also 240V.
@@jamesphillips2285 Well Datacenters often use something like 400V (very custom) or 240V (as seen the million dollar unboxing) AFAIK, but in homes (and maybe even in smaller Datacenters) it'd be hard to switch plugs because you'd have to have both sockets in a home for some years if not decades, otherwise most would probably switch to 240V (at least they should for efficiency), but yeah legacy makes that pretty hard... (Also you'd need to change those dangerous plugs if you don't want people to die, 240V packs a hell of a punch, the shock ahould be 4 times stronger)
Fast car charging is DC btw.
Australia is also 240v. You find a lot of multi-volt stuff now, switch-mode power supplies have made various voltages/frequencies a non issue so only one needs to be made. It's not any cheaper to make a 240v only, and barely any efficiency difference now.
If anything, wide voltage appliances(with a standard IEC plug) make buying items easier as you can shop anywhere and just swap your local power cable for your area.
@@lunchie80 well consumer power supplys don't do this, but in server you seem to often see that the PSUs have double the Power for 240V, so you could probably build a 400V regular PSU to go out to like 750W with 240V only (and that's what makes it cheaper), you might not even need to change much in the hardware design because of that, you probably only need to change the output side of things.
(Also you don't really get PSUs with non EU plugs here, so that's pretty much a non-issue for consumers)
Well then you just generate extra waste and get rid of inter-compatibility, like imagine you're American and you move to somewhere in europe and power supply companies have made it where you only have 120v and 240v power supplies in the areas that use those, when they move to Europe or most anywhere else they have to buy a new one, and vice versa. Honestly we just really need a universal power standard but that won't happen for a long time, if ever.
When that dude in the back clapped @~13:40, I almost lost it, LOL.
That scene jumpscared me.
scared the shit out of me
8:15 NTC thermistors is used for inrush-current limiting. When the capacitors on the input side of the PSU are fully empty and the NTC is cool to the touch the NTC thermistor adds resistance to the AC circuit to gradually charge up the capacitors over a longer period of time instead of trying to charge them up very quickly all at once. As power starts to flow through the NTC thermistor it begins to heat up and the negative temperature coefficient (NTC) means as it heats up the resistance gets lower making the NTC thermistor look more like a direct wire in circuit instead of a resistor. So it might start at like 18 or 20 ohms but as it warms up it changes to less than 1 ohm over a fairly short period of time. It basically makes sure you don't blow the mains breaker when you first plug in the PSU...
It's a little frustrating that LTT has very high demands for hiring people in LAB, but these people end up knowing their job poorly.
None of the people in the video could find out the markings of the mosfets and calculate the maximum available current, no one opened the datasheet for the transformer and сheck its maximum power.
so its for soft start
@@gazooc since when is this ltt labs
Kyle not recognizing labeled NTC was really painful tbh
As you are really knowledgeable about physics could you tell me how would one go around calculating V,I,R when two of these are given both in series and parallel. It would really help if you could tell me how to for example mathematically separate currents at the two resistors in parallel to compute their values when V and R are given. I have a test on Tuesday and would really appreciate the help. All 6 scenarios for series and parallel.
The probable reason the PSU case is getting hot: The internal transformer works at high frequency above 20,000 HZ and is working way above it's Ampereage capacity, as a result, it's High Frequency magnetic field expands beyond it's physical core structure, as a result, the AC magnetic fields bombard the external steel case, heating it like an induction cooker. I've seen the same phenomenon when a high frequency transformer is overdriven. The more you know.
A few things to look for:
The extension cord modified for 240 volt: I see a fire risk because the indicator light on the business end is now dissipating 4x the power. they are neon lamps with a series resistor. Unplug when not in use.
Wow how could you guys not take a look at the temps of this PSU with a FLIR camera
I was really curious on how hot this was running lol
Or even better, stick some actual sensors in there while you're looking inside
Never cheap out on power supply. It is literally insurance of your parts.
indeed. But considering 2000w? thats a lot lol, most parts now a days don't use much power. My intel nvidia system is prety beefy and still idles at 90w and medians at about 200-300w depending on game, on a old class corsair 750w supply*(one of the bests I ever owned, as I own several); hard to find now a days :( . My netbook is like 5-10watts lol.
A good quality 500-750 w PSU goes a long way as they are prety strong, need one with good high amp rails for some cards/cpus, if you don't plan on rigging 2 or more video cards.
Also, depending on heavyness, helps too.. CHeap psus don't weigh much. Good psus, weigh more which I find interesting.
I really can't understand why anyone would buy one of these PSU's. Spend thousands on a build with a 3090Ti and high end CPU etc, but can't spend $300-$400 on a quality 1200-1600w PSU, which is plenty of power for the build.
@@bongong1 Its fun to spend money on a badass GPU and a super fast CPU. Spending money on a metal box you will never look at past initial setup just isn't as fun. Even if it is a very important metal box.
@@bongong1 Plus people are on a budget, some*, if you are able to cut costs and invest in performance on other parts and risk, and it works out, money saved for some. I've done it myself too, but I was lucky to get a no name psu with heavy components which is a good thing, and lasted me a long time, no use for it tho, as its old; mainly only looked at amp rails for my old 780 ti back then.; but switched it out to another corsair later on.
If going for a no name brand, always make sure for a lot of good reviews and look at the bad ones too. Sometimes they can be good, sometimes they're just bad.
@Khel yea But I don'T ever think that far ahead on my builds like super crazy high perm builds, usually just keep them to a min with the 80s/ti's , I think I gone down the list on my buiilds from 780s and climbed above.. Usually keep the watts low when I can. I don't think theres many that do, as they have a hard enough time to get more than 1 video card..
Was expecting to see the server psu not a normal ATX one
I want to see some really horrible PSUs like Apevia and Logisys, especially the old acrylic ones that would melt under load.
@@Mr.Morden I did a teardown/test on a super cheap AliExpress PSU a couple years ago. It was quite poorly constructed, but seemed to perform fairly well nonetheless. ruclips.net/video/pRafY7S3fKw/видео.html
So no one is going to talk about the thumbnail going "WARNUNG"?
I would like to see it tested on equipment like the one that gamer nexus has to see its limits and how far can it go
They should send it to GN for follow up/
Even short of that - anyone can afford some car headlights to use as a consistent controllable dummy load and i'm sure they have an oscilloscope to measure regulation and ripple.
@@BWcapture right!
I was just going to comment this
When he first showed the label, before talking about it, I too was confused how 1766 watts across all rails was actually 2000
12*150=1800
the same way that a gold rating is 95....
I'm confused about the why can't they just plug the PSU in the normal wall plug. I mean, is 2000W...
@@mastroitek they in north america
@@girlsdrinkfeck I know that, they have 110V, but don't they have 22A?
That clap at 13:30 really got me lmao
I was vaping and as soon as I read 95 Plus Gold I died kinda like Tom Scott
Also the name Chunky Bois is in line with the Long Boi™ from Madison
NTC (thermistor) is simple softstart for bulky capacitors
TVS (voltage transient suppressor) suppresses over-voltage/lightning transients
Japan actually only uses 100V in most places, and then to make it more complicated the south-west of the country is 60Hz and the north-east is 50Hz
Half as interesting viewer?
Wait. How in the hell do you make a grid that has different phase frequencies?
@@rockytom5889 ruclips.net/video/Mo88zA5nq4Q/видео.html
@@rockytom5889 You don't. Japan has two grids
@@jt....
Ok that makes more sense. But even still, why make then different? Is it a case of it being too expensive to replace old tech or what?
Id love to see a video of all the prototype ltt screwdrivers that didn't make it. I think it would be interesting to go over all of the reasons they didn't make it in.
Great idea!
Hopefully when they release the screwdriver and backpack we get a documentary style video of the prototypes.
Also want to know what happens to the OG orange screwdriver that Linus has used since forever.
Japan uses 100VAC, which may mean slightly lower performance or slightly higher amp draw if North American appliances are used unmodified.
Additionally, some of Japan runs on 60Hz (like NA) while some of Japan runs on 50Hz (like Europe). YMMV.
Alex: *Shows off transformers* "Don't touch these."
Kyle: *Immediately touches transformers* "I see a lot more chunky boi's!"
South Africans are just built different🤣
he should say "dont touch these when they are working"
@@seushimarejikaze1337 No, I know. I just thought it was funny.
@@suporjustin it sure is. curiosity sure killed the cat. then the nickname he gave them. here come the expert : "we see here a lot of chunky bois" rotfl
Those 'chunky boys' are called chokes.
7:42 That is not true. The point of a MOV is not meant to 'level out' the spikes. The point is that if an extraneous voltage spikes the MOV shorts, in turn triggering the fuse. Short term the fuse will not blow due to thermal inertia, but most over-voltage events are long enough to burn the fuse. This in turn protects the power supply and components after the fuse from damage. This is why you ALWAYS see the MOV after the fuse in the circuit.
Actually without triggering the fuse a MOV would destroy itself extremely quickly as it cannot handle much power at all. It shorting a high voltage to ground with a low resistance would mean it needs to dump massive amounts of energy in a small time, hence it cannot be the main protection device.
Sure it might work for short spikes, but it is not a reliable and safe way of doing things. Especially as MOVs tend to fail in short circuit mode, which means that they will burn and cause a fire hazard.
Where the fuck did they find that guy, isn't he like supposed to know shit about electronics? He was wrong about everything he has talked about in every video he's in
Can confirm, an unfused MOV is a lot more trouble than no MOV at all! I once connected a 120V power strip to a 240V source, not realizing it had MOVs inside it (without fuses). An enormous bang ensued, followed by smoke emanating from the power strip. The output of the power strip didn't even shut off.
@@DielectricVideos My power strip had 3 MOVs as crude over voltage protection and "filtering". In the middle of the night the MOV between live and neutral decided to commit suicide and went with a loud bang. It was on a regular european 230V 16A circuit too for extra spicyness. MOVs NEED a fuse, be it a normal one or a thermal fuse. When they fail, they mostly fail short. Also they tend to heat up quite a bit when they get tired. MOVs have a limited lifespan and can only absorb so many transients.
@@DarkoPetreski like I was so mad ...they got so many thing wrong ..can't you take a day and search this stuff on Google? Smh
Btw "Warnung" is just "Warning" in German. They just want you to know how dangerous it is :D
You guys should do collabs with actual electrical engineers who know what goes into power supplies to do side by side analyses like this. The size of a transformer for a given wattage and frequency is mostly the same regardless of voltages unless you're at very low or very high voltages. And PFC is necessary for anything at this power level regardless of voltage level. Weight difference could come from smaller filters on the AC side resulting in more EMI, smaller inductors and caps on the output meaning higher output ripple. It could also be that they used higher switching frequencies which would shrink weight and size a lot at the cost of efficiency which people are a lot less likely to notice
alex clark guy is an actual ENGINEER!
You do know that Alex is an electrical engineer, right?
As everyone's said that's Alex, also Kyle is an electrical engineer as well I believe
They do have actual electrical engineers. They just don't put in the time and effort to actually analyze anything cause being "probably correct" is all they need for a profitable video.
Agreed 👍👍👍
Help me understand why it was necessary to hack a NEMA 15R onto a power cable when you could have just used an actual 240V PDU with a standard C13/C14 connector. The C13/C14 is rated for 240V use and you could have used the opportunity to actually give some tech tips about different power connectors that typically only exist in the datacenter rather than "really bad idea" hack jobs.
"entertainment value" They know their audience well.
Oofta guy!
If they were going to hack it, it would even have set a better example to put the NEMA 15R onto the C14, then use a 240V extension cable rather than making a "spicy" one.
@@BobHannent A C14 is a computer inlet and a 5-15R is a North American outlet. A cable with both of these wouldn't have helped. I think what you want to say is a NEMA 6-whateverP inlet plug on one end and a C13 outlet on the PC end. For their particular setup I believe they were using an L6-20P plug. In datacenters L6-30P plugs and L6-30R receptacles are more common.
Maybe because they didn't have a 240V PDU lying around?
OMG LTT sometimes pisses me off so much. Like they literally said during the video that just because it is running doesn’t mean that the PSU is adequate. And they do the same thing.
Ending up sort of recommending this trash PSU that will burn itself off if running for too long.
They ran it for like what 10 minutes? The testing they made is not enough for the conclusion they made
Exactly. And they said the numbers add up to ~1700W, and they didn't even try to go above that.
I love them,but yes,this thime they did a mistake. It is important to watch ripple for components,stress test and "long" time stress test,BUT they didn't reccomend this. In fact they multiple times said "Wow,it's just awesome how it didn't exploded.". So don't say that they reccomend this.
This video is for entertainment, not a professional analysis of the product. Grow up, and stop posting cringe comments.
@@0xbadcafe You know,it isn't wrong at all,I found almost all of their videos interesting. But someone can mistake theit words,as I said,they didn't reccomend these.
@@0xbadcafe remember that people are stupid and maybe they will buy this just because they see that It can run 2 3090
Doesn't matter how long it wasn't plugged in, dielectric absorption is no joke. Guitar amp techs have felt it.
That explains something lol I worked with a decent backpack vacuum with a 50 feet cable which I just unplug from the outlet and I didn’t turn it off before and it shook me I grab it
I love how the Thumbnail shows „Warnung“ in German instead of Warning
Oh I thought it was a typo lol
@@farmerjoe. Linus says at 1:23 that they think it's a spelling error but it's actually just German
it's obviously a trick to attract all the germans on the internet
@@user-op8fg3ny3j it could also be a spelling error because U is placed left of I.
Why, that is as it should be. Germany has 240V as standard in their homes the US has not. So you label in the language of your target market if you want to sell there.
"Where are we going to plug this 2000w monstrosity in?"
Me as a german: Dude that's only 2000w, my normal wall outlet is wired up for 3600w lol"
_LMG snakes a power plug over the ocean_
Isn't it standard 4000 watt for pretty much entire europe?
@@bachmed00 I started wondering - how do American use hair dryers and such? I have a hair dryer that's 2400 watts, while average seem to be around the 2kW mark.
@@hotwheels1997 They use them, but only at half the power. Just freaking terrible. I want my kettle to finish in 2 minutes not 4!
@@DrakkarCalethiel Damn, women must take even longer to get ready over there. Do appliances automatically lower their draw or they’re specifically made for the US market at lower power? I’ve never thought about this being an issue anywhere, new things to learn every day.
Jeez you guys, as someone who repairs switch mode and linear power supplies and inverters I noticed you got so many things wrong about the design/topology of the circuits inside these supplies that maybe you should have edited out the 'critique' of the interior completely. First, you highlighted the secondary output filter stage in the video, not the input EMI filter stage. Second, "NTC" = Negative Temperature Coefficient, that would be an inrush current limiting thermistor, not a MOV (as a side note, the cheaper power supply has no MOVs that I can see, and is likely just using spark gaps on the bottom of the board). NTC thermistors limit inrush current on startup and are then generally bypassed with a relay, MOVs shunt high voltage transients to neutral/ground to protect the circuit. Third, nothing wrong with touching a transformer that's not powered, they don't hold a charge.
As far as why the Silverstone power supply is heavier. First, both of these power supplies have EMI filters (the Silverstone has multi-staged EMI filtering) and both have APFC (Active Power Factor Correction) circuits, on the cheap power supply you can see the large APFC boost converter inductor next to the main input caps. So stating that the cheaper power supply is lighter because it's missing the APFC circuit is wrong. Second, the cheap power supply is likely a half bridge or a full bridge / forward conversion topology and an older design. The Silverstone is a more modern LLC resonant converter design combined likely with a full bridge, which means it's using a series of inductors and resonant capacitors to filter, shape, and generate the drive signal after the switching FETs. You'll still have a main switching transformer, but you will also have large inductors in this resonant circuit, as well as the APFC inductor, secondary output filter inductors (all of these inductors look like transformers), a standby transformer, gate drive transformers, etc. Third, the modular design on the Silverstone is going to add weight, as it requires another board and more hardware. Fourth, the Silverstone has far more discrete secondary DC/DC conversion components and filtering as it is likely using synchronous rectification - that is, MOSFETs are being driven on the secondary side by a separate controller IC and are being used to "emulate" what schottky diodes would normally be doing on cheaper power supplies. This is a much higher efficiency design but it requires more components, increases complexity, and increases the BOM cost. Fifth, this power supply is undoubtedly using real copper everywhere. Aside from all this, there is a lot more but you get the idea.
Believe it or not, but cheap generic power supplies like the one in this video sometimes don't even use copper at all, and will instead use aluminum that is coated to look like copper. This means the wires, inductors, transformers, nearly everything will be aluminum, as it is cheaper. This is not good, as it is not as good a conductor as copper, has somewhat higher resistance and different impedance characteristics, so it generates more heat under higher current loads (particularly with inductors as aluminum's magnetic field saturates much faster). If these cheap power supplies do use copper, they will use as little as possible.
Lastly, a bit of a nitpick but Alex said "I'm going to take a couple of guesses as to why our Chinese power supply is so much cheaper..." Just an FYI but virtually ALL ATX power supplies are made in China, even the expensive Silverstone power supply you have there. Silverstone likely contracted Seasonic to design and manufacture that power supply, and all Seasonic power supplies are made in China, even their high end models. People really need to get away from this mentality that China = cheap junk. It's ridiculous and ignorant.
Nice going into the details, I was grinding my teeth at multiple intervals when they talked about stuff they didn't know. Small transformers won't hold a charge because the stray capacitance is negligible, however HV transformers must be put to ground, otherwise you'd probs die.
Fantastic stuff, thank you! (Y) :)
I love LTT, “don’t try any of this at home, anyway.. here’s how to do it” 😂
I was dying lmao🤣🤣
When the “expert” can’t tell you what the components are you know you’re watching a LTT video.
5:51 - And "Nippon" literally means "Japan." It's not a brand, but a country. Actually had to stop watching at this point. Just couldn't finish it.
@@Lurker-dk8jk en.wikipedia.org/wiki/Nippon_Chemi-Con
@@Lurker-dk8jk the company that manufactures these capacitors is called nippon chemi con............... 5head
I agree, I just got so annoyed just soooooooooooooooooooooooooooo many mistakes
@@Lurker-dk8jk lmao you think ur a know-it-all
Fun video as always but it was a bit tough watching the analysis of the supply insides, those ntc thermistors are for inrush current and are not MOVs, that yellow tvr was likely an actual varistor. I'm not an engineer anyways, and I get that a detailed explanation of the different topologies between the two supplies is out of the scope of this channel.
Yup, and talking about the 240/120v switch: there's actually very little extra hardware. The switch turns the bridge rectifier and input capacitors very neatly into a voltage doubler.
The talk about additional transformers was all wrong
@James Hogge Yeah the discussion about the transformers was pretty hand wavy, those things are proper insulated so just touching the top of them isn't going to do any harm. They also aren't made of magnets, unless you're very loosely referring to ferrous materials. If I had to have a guess I'd assume each transformer was for a separate rail, or maybe even something esoteric like a multiphase full bridge/half bridge converter considering the power density.
Yes it's always a pain watching these bits of their videos, but it gives a great perspective of a layman.
yeah the level of incompetence in correctly comparring the two is jarring at times
@@jameshogge No.. Actually not... Those Switch Equipped PSUs are too crap and old designed Half Bridge Converter.. They tend to fail more than.. modern Dual switch Forward and Resonance LLC PSUs..
In modern PSUs.. The APFC Circuit actually Boosts Voltage for primary Capacitors.. to like 350 volts...
And those extra transformers in that PSU.. we can't say about them much .. because.. they can be connected in many many ways .. like 2 in. Series.. or both in parallel of Primary series and secondary parallel.. or vice versa.. there are many possibilities... For transformer configuration for load sharing in PSUs...
As far as I know, US and Canada use white for the neutral and the black is line (hot). For a 240v system, the L1 would be black and the L2 would be red.
would have been interesting to compare the actual efficiency at the wall between the two PSU's
going by how much heat was been ejected probably 20% been lost maybe more
@@ratbag359 It can't be, it's rated 90+ Gold after all
Honestly the craziest part of this video for me was finding out a 2000W power supply exists.
I remember a 2400W PSU from Superflower, back when Quad SLI was a thing.
Only on 230V though.
Me too, cuz I could have sworn the law limits 110 volt devices to 1500 watts. Either I was mistaken, or somebody flat out lied.
@@Shorty_Lickens I also thought that US law allowed max continuous draw of 1500W, and max peak (momentary) draw of 1800W on a standard outlet
@@tennisontower8003 see you know more than I do.
I'm gonna miss Colin, may his works in that workshop be remembered (no he didn't die, he moved to a different company)
Oh, what? Colin left LTT?
what when did this happen ?
My headcannon is he quit because he spent so much time on that custom desk only for 90% of it to be covered by a deskmat
@@akshatsingh9830 a couple weeks ago, I believe
Linus: "Don't touch the transformers"
*Proceeds to touch every transformer and capacitor **6:35*