I was always under the impression that the CMOS battery is being used while the computer is off, but not when it’s on. In fact I thought it is being charged when the computer is on. Am I wrong? I truly don’t know, so pls ignore my ignorance.
I spent 3 hours trouble shooting my build till I finally found that I had yo take out and put back in my CMOS battery. Just thought I would put that here since it reminded me haha
Some boards actually hate it when you do that, and relies on the CMOS CLR jumper pins not removal of the battery. Something I learnt while fixing some dumpster 4th gen boards!
here's a tip, if your PC won't turn on the first time you ever turn it on, do a power drain then remove the CMOS and wait about a mjnute then try again with ur in :))
This happened to me the first time I built my pc, and i shit myself coz my dad bought me the components and wanted a technician to build so I don't mess it up, but after days of watching YT vids on how to resolve it worked
@@geodev383 use your third leg to make you famous by going to freakshow events. People will make fun of you, but hey, you're the one getting paid, so who's really winning?
Actually, newer pcs dont have a cmos battery since the way the BIOS stores configuration in newer motherboards is non-volatile meaning it wont reset if the computer loses power. On modern pcs it is just used to keep track of time while your pc is off.
Not always true. As long as the PSU stays on and connected it will keep the settings, date, and time. If the mobo loses all sources of power (AKA both the PSU _and_ the CMOS battery), only then will stuff be lost. Also, (possibly not so) fun fact: when your computer is off, the power supply is still providing power with always-on pins, hence why you should unplug completely before working on it. Edit: @Jeff Waters reminded me that you _also_ need to drain any juice in the capacitors on the board. The easiest way is to (once power is disconnected) press the power button. I personally will tap the power button a couple times, hold it for a few seconds, then tap it a couple more times. You can also jitter-click the power button if you have any pent-up rage from troubleshooting computers lol
Just hold the power button until led doesn't light anymorw, when capacitors are drained there isn't any energy anymore. 24 pin is pretty hard to remove sometimes.
Oh it properly saves your bio data due to having power even if it is taken out while it's on it is fine due to the main power is giving power to the CMOS area
It may depend on mainboard. For some mainboards, it may effect bios setting. Fortunately, I used a second hand Dell optiplex 3050 sff and I badly damaged cmos battery holder until it could not be used any more. The effect was only after I powered on the pc, it would alarm that time of the day is not correct but other things still worked as usual. The date and time will be sync automatically and correct again after entering widows.
If your computer connected to electricity, it don't use a CMOS battery, it uses battery only when it disconnected from electricity, and you will lose settings of bios
the battery is powering up CMOS because like RAM its's not state memory and to not lose the bios settings it needs to be powered by this little battery, it's actually pretty useful knowledge (btw sorry for my english but I can't really write about stuff like that in engliah but I hope you can understand everything)
Actually really just depends on your CMOS battery is just there for emergency standby power for the bios because as long as your computer is plugged in there still standby power that normally keeps everything powered
When the PC is on, there are some diodes on the motherboard that divert a part of the 3.3v from the ATX power supply to the CMOS, so it doesn't matter, if you take the battery out the CMOS will still receive 3.0v from the power supply.
If your PC was manufactured in the last 10 years, chances are it doesn't even have an actual CMOS - the battery only keeps the clock running when its powered off, the BIOS settings are actually in NOR flash, which is nonvolatile. But because so many tutorials still tell you to "clear CMOS" by pulling the battery, many motherboards artificially emulate the old behavior when they detect a removed battery.
After a restart without the CMOS battery the computer will loose track of time and unless it updates it automatically using intermet which is unlikely to happen, you will have to refresh it manually. And consider to overclock your ram again because the motherboard forhot all ur settings.
you don't have to do that, the bios settings won't cleared unless you plug out power cable to the wall and/or from the power supply to the motherboard. even then you usually didn't immediately lost the settings, you need to clear all left over electricity from the system by pressing power button a couple times
@@dualkeyboards yeh. When I lived at a place that didn't have enough power supplied to the house and breakers tripped, I lost all my bios settings every time. Twas then that it finally occurred to me to replace the battery and never had the problem again
I had a PC build that would crash during windows start up, would get the logo and spinning dots then it would freeze. After a day of troubleshooting I changed the cmos battery and boom windows loaded. Apparently quite common.
this thing dosen't affect the pc so much but it might be a little bad because all of your bios settings are gonna be set to default. The battery supplies the bios chip every time which contains the saved data from bios.
I was locked up once and smuggled in a lot of computer parts to built a pc but I didn't get a cmos battery with the motherboard so I stole one from one of the computers the guards use and put it in just to get it to turn on then I took it out and returned it but I had kept it running for 16 months without a cmos battery. I had this computer setup in an old storage room nobody knew I could get in. I used the old computer junk they already had in the storage room but they had an old hp compaq windows Vista that didn't have a motherboard for some reason so I had someone delivere it after teaching them how to install the cpu and cooler over the phone. It was an i3 2130 with 8 gb ddr3 on an old dell oem mini itx motherboard.
bios would only reset if power was removed also the fact is if u leave the power on with no CMOS battery u can set the bios and it will remain until power is removed
For certain motherboards, they only save the settings with battery power if it's not plugged in. So if you don't have a battery but still plugged in the settings won't reset even if you restart or shutdown.
That 3V Lithium CR2032 cell is in parallel with the 3.3VSB rail that powers the RTC (clock) well in the chipset. So as long as the computer is plugged in and there is electrical power in the socket, there is a 3.3V supply in the mainboard even if it is powered off, running the RTC function. So it doesn't matter if the coin cell is there or not. Upon rebooting, BIOS may pop up an error.
It’s not in parallel. Sure, CR2032 is connected to the chipset, but it’s not really parallel to the 3.3VSB. You can check it by measuring a voltage between battery holder terminals and observing it yourself.
@@staidey5994 As per the intel reference board schematic, it is indeed parallel. You will not get a 3.3 V reading with multimeter probes on battery terminals because 3.3VSB and 3.0VBAT rails are connected through no return valve diodes to prevent 3.3VSB rail from charging or discharging the coin cell.
I figured out that a CMOS battery is actually for pc users that tinker a lot with the bios. BIOS is a very important part of your system. If you screw it up, your motherboard will not boot. But that's why the CMOS battery exists, so if you screw it up, a charge from the battery holds the bios settings, and you can disconnect the current to reset the settings.
the video has incomplete information the bios settings won't cleared unless you plug out power cable to the wall and/or from the power supply to the motherboard while the battery is out. even then you usually didn't immediately lost the settings, you need to clear all left over electricity from the system by pressing power button a couple times. this is why resetting bios require taking out the battery and clear any power to the PC.
It works fine because the CMOS battery literally only is there to provide voltage whenever there's zero power (not just turned off). Removing it only causes a problem if you lose electricity.
Old video game carts that have the ability to save data also uses a Battery for saving your game..and pokemon used a battery for the time functions in game.
Cmos contains the bootrecord and bios startup data Tho system doesnt always need it for startup since it can run temporary bios with default configurwtion, it can damage ur pc
Actually, if you remove the battery, and don’t unplug the power, then it will actually still retain all the BIOS settings even without a battery. You have to completely disconnect power for the settings to be reset.
a fakt for you too motherbords try to recharge the battery more or less by accident and gues what it works. that is the reason why a pc that is used every day did not need a new battery for years but a pc that is used once in a week or month needs a new one after couple months
Yeah it isn't really important, but it's there so it keeps time and date even when the power is off, so if you were to restart without the cmos battery, the date and time will not be set.
Not entirely true. CMOS battery’s been put there in order to store the BIOS settings and keep track of date/time while the computer has no other source of power. Basically, removing a CMOS battery from a plugged computer won’t reset the BIOS settings to default, however, as soon as you disconnect the power and let the caps to drain without having CMOS battery present, only in that case the NVRAM would reset itself.
Also when my CMOS battery was dead, the clock in the computer wasnt updating always. So the clock in my computer was false everytime without CMOS battery
Actually, as long as the PC still gets power while turned off, it won't clear the CMOS. At least, that's how it was for my last Mobo. Never replaced the CMOS battery on it, and it only affected me when unplugging it or during power outages.
Typically motherboards won't factory reset with the CMOS battery out unless power is removed from the wall the CMOS battery is a backup battery for the BIOS the main power comes from the power supply to keep its data if power is lost from there the backup battery provides it
I have a second hand dell vostro laptop and the previous owner had put a password on the bios so I couldn't change simple things like the boot device order. Did the batterflip (which is how Dell emplyees do the cmos removal thing) and it off course didn't remove the security password. So then I removed the cmos battery with the laptop turned on. It immediately turned off and I thought I had killed it. Put the cmos battery back ,turned it back on and..... security password reset .
This, I learned on my own. I did it often as needed, until one fateful day, when I lost my grip of the battery and it slipped from my fingers and fell onto the motherboard... Sparks flew and the battery jumped where it landed with sparks until it landed on my video card at that moment when I unplugged it as fast as I can. Not that unplugging spared the video card from any electrical short or anything. I can never imagine myself doing that again. 😭
I really enjoy ur videos! I want to see what happens if you remove pcie power for the graphics card and the eps power on the motherboard while the pc is running
Yeah a Cmos just holds the Biossettings and allows the clock to function during powerloss. If your pc is on, it still has its power Imagine your Cmos runs out of power, your pc wont crash because of this
I think everyone knows what a CMOS battery do not just in computer's but any other device it's main function is to keep track of the date and time so removing it while the system is on won't do anything
"[...] wil be set to factory defaults" this is not completely right. Most Mainboards (at least all that I know) have a curcuit where the CMOS-Battery is bypassed via Schottky-Diode by the V_stb(3.3V) when the PC is connected to Mains power. So the Battery is basically bypassed as long as the PC is connected to mains power
Well since the Basic Input Output System and the operating system are isolated from each other and the Complimentary Metal Oxide Semiconductor only works with the BIOS I wouldn't have expected anything different
Imagine removing the battery, plugging it back in, but now knowing which side goes up.. Yep, I was to lazy to open the PC again so I made a batch file that automatically resets the time and date when I power it on now.
Hello Traveller, I see that you have been traveling through youtube shorts. Would you like to buy any of these items before you continue to travel? Items : Anti cringe potion (to avoid cringe for 10 minutes) x99 Shield( to avoid cringe multiple times )x1 Shield potions ( to make your shield stronger ) x5 Chad potion( So that you don’t see cringe for 10 hours )x10 Sigma male potion ( so you stop watching youtube shorts for 1 hour to avoid cringe and to continue life in a stable society )x99999 All items are added into your inventory. Good luck!
Removing the CMOS battery in a running PC won't do anything until you restart, because modern operating systems have Bios disabled since early on the boot stages
Weird, it shouldn't reset as long there is power flowing through the capacity this battery is hooked up through. Which means unless you fully plugged off your pc, it shouldn't reset... Weird
No the BIOS won't reset if you restart. It only resets if you unplug the power cord. It's only when the mobo loses power completely that the BIOS resets.
The pc keep running because the bios is only executed at startup, after checking everything it passes the control over the OS, and that doesn't need the battery
Rebooting won't cause the BIOS settings to go away unless the PC loses power. I've changed plenty of cmos batteries while the PC is running without the loss of settings. Granted I don't recommend changing the battery while the PC is on. 😁
![[DOKKAN BATTLE] Worldwide Campaign Announcement Video Part 2!](http://i.ytimg.com/vi/JpT5Voak6WA/mqdefault.jpg)
*me, taking out the CMOS battery to save energy and putting it back when i restart.*
Saving environment right here.
I was always under the impression that the CMOS battery is being used while the computer is off, but not when it’s on. In fact I thought it is being charged when the computer is on.
Am I wrong? I truly don’t know, so pls ignore my ignorance.
BIg BrAiN. SmOrT!!
@@apex_blue It doesn't use why turn on. However, it doesn't charge itself. you have to replace it when used for a while.
@@PakkaponPhongtawee it will be around 6-8 years
"Pretty cool, riiight?"
The fact that I know you're referencing styropyro 🗿
😂
Styropyro reference 😂
Lmao it was like when i heard "Pretty cool" without "right?", my brain was like : "wait, something's wrong"
Srtyropyro fans: i scence disturbance in the force
I spent 3 hours trouble shooting my build till I finally found that I had yo take out and put back in my CMOS battery. Just thought I would put that here since it reminded me haha
Some boards actually hate it when you do that, and relies on the CMOS CLR jumper pins not removal of the battery. Something I learnt while fixing some dumpster 4th gen boards!
been there, since then performing a CMOS reset has become one of the first things i try when fixing a machine. solves a lot of issues.
here's a tip, if your PC won't turn on the first time you ever turn it on, do a power drain then remove the CMOS and wait about a mjnute then try again with ur in :))
This happened to me the first time I built my pc, and i shit myself coz my dad bought me the components and wanted a technician to build so I don't mess it up, but after days of watching YT vids on how to resolve it worked
Sir. I followed your steps and now i have a third leg. Any tips?
@@geodev383 use your third leg to make you famous by going to freakshow events. People will make fun of you, but hey, you're the one getting paid, so who's really winning?
Happened to me
@@CringeFratm Damn....bhai whats is your pc build and what monitor?
Actually, newer pcs dont have a cmos battery since the way the BIOS stores configuration in newer motherboards is non-volatile meaning it wont reset if the computer loses power. On modern pcs it is just used to keep track of time while your pc is off.
Actually RTC will restore the date time after power loss.
Battery is there to keep the old habits like bios reset.
@@kikihun9726 to keep the clock running requires power
Actually, many newer PCs do. There are a great many motherboards out there.
@@QualityDoggo yeah but RTC clocks can sync using a global clock if there is loss of power
If this is true... How do I reset with newer PCs?
Next: *What happens if you remove the power supply from a running computer.*
uhm its like turning the pc off
@@realteletubby you have no sense of humor
@@adhamsalYTno, you don’t
@@francescolorenzelli8912 bro this was commented 8 months ago leave me alone
@@adhamsalYT still, you didn't get the fact that he was ironic, and you didn't get it
Not always true. As long as the PSU stays on and connected it will keep the settings, date, and time. If the mobo loses all sources of power (AKA both the PSU _and_ the CMOS battery), only then will stuff be lost.
Also, (possibly not so) fun fact: when your computer is off, the power supply is still providing power with always-on pins, hence why you should unplug completely before working on it.
Edit: @Jeff Waters reminded me that you _also_ need to drain any juice in the capacitors on the board. The easiest way is to (once power is disconnected) press the power button. I personally will tap the power button a couple times, hold it for a few seconds, then tap it a couple more times. You can also jitter-click the power button if you have any pent-up rage from troubleshooting computers lol
Just hold the power button until led doesn't light anymorw, when capacitors are drained there isn't any energy anymore. 24 pin is pretty hard to remove sometimes.
@@jeffwaters8238 Yeah, forgot to mention that, whoops
not what i expected to happen
I mean it only exists to save settings while the computer is off so it makes sense it isn’t necessary while it’s on
Day 21, asking to use honey in place of thermal paste
I thought he used that awhiilee ago
YAY! Thank you for making the video for me!
Oh it properly saves your bio data due to having power even if it is taken out while it's on it is fine due to the main power is giving power to the CMOS area
As I expected, computer running fine 👍🏻👍🏻
It may depend on mainboard. For some mainboards, it may effect bios setting. Fortunately, I used a second hand Dell optiplex 3050 sff and I badly damaged cmos battery holder until it could not be used any more. The effect was only after I powered on the pc, it would alarm that time of the day is not correct but other things still worked as usual. The date and time will be sync automatically and correct again after entering widows.
I jut removed mine cause my display wasn’t working then this vid pops up😂💛
If your computer connected to electricity, it don't use a CMOS battery, it uses battery only when it disconnected from electricity, and you will lose settings of bios
I'm surprised you didn't get shocked good video
usually removing a battery doesn’t shock you.
It's a whopping 1.5V lol
the battery is powering up CMOS because like RAM its's not state memory and to not lose the bios settings it needs to be powered by this little battery, it's actually pretty useful knowledge
(btw sorry for my english but I can't really write about stuff like that in engliah but I hope you can understand everything)
I can't get enough of this channel
Actually really just depends on your CMOS battery is just there for emergency standby power for the bios because as long as your computer is plugged in there still standby power that normally keeps everything powered
When the PC is on, there are some diodes on the motherboard that divert a part of the 3.3v from the ATX power supply to the CMOS, so it doesn't matter, if you take the battery out the CMOS will still receive 3.0v from the power supply.
If your PC was manufactured in the last 10 years, chances are it doesn't even have an actual CMOS - the battery only keeps the clock running when its powered off, the BIOS settings are actually in NOR flash, which is nonvolatile. But because so many tutorials still tell you to "clear CMOS" by pulling the battery, many motherboards artificially emulate the old behavior when they detect a removed battery.
I absolutley love the case
After a restart without the CMOS battery the computer will loose track of time and unless it updates it automatically using intermet which is unlikely to happen, you will have to refresh it manually. And consider to overclock your ram again because the motherboard forhot all ur settings.
If i want to keep my bios settings, is it a good idea to change the cell while the pc is running? That is something i asked myself a lot of times.
you don't have to do that, the bios settings won't cleared unless you plug out power cable to the wall and/or from the power supply to the motherboard.
even then you usually didn't immediately lost the settings, you need to clear all left over electricity from the system by pressing power button a couple times
@@dualkeyboards yeh. When I lived at a place that didn't have enough power supplied to the house and breakers tripped, I lost all my bios settings every time. Twas then that it finally occurred to me to replace the battery and never had the problem again
@@dualkeyboards true i did not think of that
Why the f would you do that
@@chelarestelar and you admit that??
I had a PC build that would crash during windows start up, would get the logo and spinning dots then it would freeze. After a day of troubleshooting I changed the cmos battery and boom windows loaded. Apparently quite common.
this thing dosen't affect the pc so much but it might be a little bad because all of your bios settings are gonna be set to default. The battery supplies the bios chip every time which contains the saved data from bios.
I was locked up once and smuggled in a lot of computer parts to built a pc but I didn't get a cmos battery with the motherboard so I stole one from one of the computers the guards use and put it in just to get it to turn on then I took it out and returned it but I had kept it running for 16 months without a cmos battery. I had this computer setup in an old storage room nobody knew I could get in. I used the old computer junk they already had in the storage room but they had an old hp compaq windows Vista that didn't have a motherboard for some reason so I had someone delivere it after teaching them how to install the cpu and cooler over the phone. It was an i3 2130 with 8 gb ddr3 on an old dell oem mini itx motherboard.
bios would only reset if power was removed also the fact is if u leave the power on with no CMOS battery u can set the bios and it will remain until power is removed
For certain motherboards, they only save the settings with battery power if it's not plugged in. So if you don't have a battery but still plugged in the settings won't reset even if you restart or shutdown.
That 3V Lithium CR2032 cell is in parallel with the 3.3VSB rail that powers the RTC (clock) well in the chipset. So as long as the computer is plugged in and there is electrical power in the socket, there is a 3.3V supply in the mainboard even if it is powered off, running the RTC function. So it doesn't matter if the coin cell is there or not. Upon rebooting, BIOS may pop up an error.
It’s not in parallel. Sure, CR2032 is connected to the chipset, but it’s not really parallel to the 3.3VSB. You can check it by measuring a voltage between battery holder terminals and observing it yourself.
@@staidey5994 As per the intel reference board schematic, it is indeed parallel. You will not get a 3.3 V reading with multimeter probes on battery terminals because 3.3VSB and 3.0VBAT rails are connected through no return valve diodes to prevent 3.3VSB rail from charging or discharging the coin cell.
@@Wingedmechanic Hmm, didn't cross my mind that they might've used diodes in place.
I had a pc that never had the cmos battery in it. Didn’t bother me and didn’t cause any problems. It was a server pc that I was using for gaming.
I figured out that a CMOS battery is actually for pc users that tinker a lot with the bios. BIOS is a very important part of your system. If you screw it up, your motherboard will not boot. But that's why the CMOS battery exists, so if you screw it up, a charge from the battery holds the bios settings, and you can disconnect the current to reset the settings.
Unless you destroyed the bios after an unsuccessful flash
the video has incomplete information
the bios settings won't cleared unless you plug out power cable to the wall and/or from the power supply to the motherboard while the battery is out.
even then you usually didn't immediately lost the settings, you need to clear all left over electricity from the system by pressing power button a couple times.
this is why resetting bios require taking out the battery and clear any power to the PC.
It works fine because the CMOS battery literally only is there to provide voltage whenever there's zero power (not just turned off). Removing it only causes a problem if you lose electricity.
Old video game carts that have the ability to save data also uses a Battery for saving your game..and pokemon used a battery for the time functions in game.
Cmos contains the bootrecord and bios startup data
Tho system doesnt always need it for startup since it can run temporary bios with default configurwtion, it can damage ur pc
It doesn't necessarily "hold" it it's just that there's a so the "sram"(bios ram) on the motherboard doesn't clear when the computer shuts off
Actually, if you remove the battery, and don’t unplug the power, then it will actually still retain all the BIOS settings even without a battery. You have to completely disconnect power for the settings to be reset.
This battery is for the bios to have power even without a PSU connected, and when the computer is connected, the bios takes power from it
insert explosion FX the moment he takes it out
a fakt for you too motherbords try to recharge the battery more or less by accident and gues what it works. that is the reason why a pc that is used every day did not need a new battery for years but a pc that is used once in a week or month needs a new one after couple months
me using old laptops and pc with busted CMOS battery: wait you didn't know that?
Yeah it isn't really important, but it's there so it keeps time and date even when the power is off, so if you were to restart without the cmos battery, the date and time will not be set.
Not entirely true. CMOS battery’s been put there in order to store the BIOS settings and keep track of date/time while the computer has no other source of power. Basically, removing a CMOS battery from a plugged computer won’t reset the BIOS settings to default, however, as soon as you disconnect the power and let the caps to drain without having CMOS battery present, only in that case the NVRAM would reset itself.
Also when my CMOS battery was dead, the clock in the computer wasnt updating always. So the clock in my computer was false everytime without CMOS battery
Actually, as long as the PC still gets power while turned off, it won't clear the CMOS. At least, that's how it was for my last Mobo. Never replaced the CMOS battery on it, and it only affected me when unplugging it or during power outages.
It will not stop running because io chipset is in power. It will only stop if any metal contact with positive charge. But don't take risk.
See the before and after effect of scratching the surface of a cpu and running it
Day ten of asking mr. Yeester to use ink as a thermal paste alternative
Keep going!
@@abracadabra7805 yo know I'm going for years bruh
@@coronamakesyoucoughalot 10 days isnt a year
As long as the computer is plugged in, bios won’t lose it’s settings.
The CMOS battery is only used if the computer is not plugged in.
man those days when pci lock werent a thing
horrible
I feel smart cuz i knew this already
Typically motherboards won't factory reset with the CMOS battery out unless power is removed from the wall the CMOS battery is a backup battery for the BIOS the main power comes from the power supply to keep its data if power is lost from there the backup battery provides it
The CMOS battery is used to save the BIOSes configuration, as it's unable to access HD for writing
CMOS is only used to keep settings and clocks during S5 or S4 state where the power to the Compute portion of the PC is shut off
If you don't remove power, the settings will still be saved. Only if you remove power/turn off your power supply the cmos gets reset
I always thought the battery only worked when the PC was unplugged and or had no power to it
for somebody wondering the battery is there to save the setting if you reset, turn off, have an outage, etc
I have a second hand dell vostro laptop and the previous owner had put a password on the bios so I couldn't change simple things like the boot device order.
Did the batterflip (which is how Dell emplyees do the cmos removal thing) and it off course didn't remove the security password.
So then I removed the cmos battery with the laptop turned on. It immediately turned off and I thought I had killed it. Put the cmos battery back ,turned it back on and..... security password reset .
Restarting the computer wouldn’t lose bios settings. It would only reset to defaults if you also unplug the PC as well
Now put the cmos clr jumper while running
At the end that pretty cool reminds me of that laser that always says Pretty Cool Riiiiight
This, I learned on my own. I did it often as needed, until one fateful day, when I lost my grip of the battery and it slipped from my fingers and fell onto the motherboard... Sparks flew and the battery jumped where it landed with sparks until it landed on my video card at that moment when I unplugged it as fast as I can. Not that unplugging spared the video card from any electrical short or anything. I can never imagine myself doing that again. 😭
try removing the hard drive cable/SSD or M.2 while a computer is running in the next video please
Done
He already did
Computer would just BSOD and power off
I connect and disconnect hard drives all the time. You just need to do a rescan in diskmanager to find the drive and assign it a letter
I really enjoy ur videos! I want to see what happens if you remove pcie power for the graphics card and the eps power on the motherboard while the pc is running
Gold thermal paste Easter egg
It will also slowly make your clock lag behind eventually
Yeah a Cmos just holds the Biossettings and allows the clock to function during powerloss.
If your pc is on, it still has its power
Imagine your Cmos runs out of power,
your pc wont crash because of this
I think everyone knows what a CMOS battery do not just in computer's but any other device it's main function is to keep track of the date and time so removing it while the system is on won't do anything
It needs it to start apparently
"[...] wil be set to factory defaults" this is not completely right. Most Mainboards (at least all that I know) have a curcuit where the CMOS-Battery is bypassed via Schottky-Diode by the V_stb(3.3V) when the PC is connected to Mains power. So the Battery is basically bypassed as long as the PC is connected to mains power
Well since the Basic Input Output System and the operating system are isolated from each other and the Complimentary Metal Oxide Semiconductor only works with the BIOS I wouldn't have expected anything different
Congratulations. You know how to do a google search for acronyms.
I don't think the settings reset after a restart.
It should happen if you unplug the PC from the socket without the CMOS battery in.
Imagine removing the battery, plugging it back in, but now knowing which side goes up..
Yep, I was to lazy to open the PC again so I made a batch file that automatically resets the time and date when I power it on now.
Hello Traveller, I see that you have been traveling through youtube shorts. Would you like to buy any of these items before you continue to travel?
Items :
Anti cringe potion (to avoid cringe for 10 minutes) x99
Shield( to avoid cringe multiple times )x1
Shield potions ( to make your shield stronger ) x5
Chad potion( So that you don’t see cringe for 10 hours )x10
Sigma male potion ( so you stop watching youtube shorts for 1 hour to avoid cringe and to continue life in a stable society )x99999
All items are added into your inventory.
Good luck!
Thanks
once my server's CMOS battery came loose meaning all my settings kept on being reset
Removing the CMOS battery in a running PC won't do anything until you restart, because modern operating systems have Bios disabled since early on the boot stages
Same use as those inside SNES cartridges
Funny thing I was wondering about this yesterday
It's the clock. It counts the time when the computer is turned off.
Yep doesn’t it control the memory for the chipset? So makes sense.
This Battery For time,date and Bios ❤️
Back in the day this battery was integrated into the rtc chip and you had to replace the whole ic.
Yeah i am a bit old in the pc industry.
Just in case anybody does not know the computer only uses the CMOS battery when it first loads up
Yea all the CMOS battery is there for is to save the settings of your bios so you dont need to configure it everytime you turn on your pc
that battery is used for the computer clock to move
The cmos restart only if you unplug the power suply.
As I expected, however what happens if you take it out and put it back in BEFORE restarting
Weird, it shouldn't reset as long there is power flowing through the capacity this battery is hooked up through.
Which means unless you fully plugged off your pc, it shouldn't reset... Weird
It also resets the damn time on the device so it takes forever to get the proper time
No the BIOS won't reset if you restart. It only resets if you unplug the power cord. It's only when the mobo loses power completely that the BIOS resets.
The pc keep running because the bios is only executed at startup, after checking everything it passes the control over the OS, and that doesn't need the battery
This guy is legend
oreo cream as thermal paste
I was under the impression that CMOS was to essentially keep time while the computer was shut off.
I've always wondered what that battery is for.
its for working the computer without him you cant turn on the pc and will just make beeps
I mean,the battery keeps the motherboard powered after the pc closes so your data can stay stored
I'm 90% sure that the CMOS battery is only for saving bios settings
I used my pc like a year without the battery because its such a hassle to swap on some boards
Also consider to try taking out the wifi card on a running pc
Pretty sure it would just stop the wifi from working and when you put it back in it doesn’t work
cool i wish i finnaly get back my graphic card beacause im weiting for it month :(
>:( i cant play games
I hope you get it back
Ik that pain from when my GPU stopped working for no reason
Rebooting won't cause the BIOS settings to go away unless the PC loses power. I've changed plenty of cmos batteries while the PC is running without the loss of settings. Granted I don't recommend changing the battery while the PC is on. 😁