@@prototypep4 on a 4090 it's 2% loss if you are planing to buy a 5090 and the card is still in PCIE 4.0 it will be more... it make sense since most of that MB users will use 4090 or 5090...
Good afternoon GTR. I just wanted to say thank you. After seeing this video, I checked our Pcie 16x with the Rx7900xtx oc. And it showed x8. I was so confused. This is the z790 Godlike m/b. But I remember when I bought the 2 Crucial T705's. One 2tb and the other 4tb. I placed them in slot M.2_4 and M.2_5. The manual saved in fine print that if I used M.2_4 It will lane share and reduce 16x to 8x. So I moved slot 4 to slot 1 closest to the cpu which it should have anyway because of booting. I originally did this because it said slot 4 Gen5. But thanks again it resolved the situation and verified with Cpuid. This Channel is awesome. Can't wait until Paint time. Lol.
More than 2x nvme = M2_1, M2_4 and M2_5 No change for the 1st PCIe 5.0 x16 slot to x8. For 2 m2 take M2_1 and and M2_4 so 0 problems for your PCIe 5.0 x16 slot Only the temperature can be a problem for a PCIe 5.0 m2 under load
@@R6ex I have this MB and it works quite steady. It does require a Bios update for the memory to work. Also first start up (after bios update)it will do a memory test and it might take a few minutes. Just walk away.
To get PCIEx16_1 to run at the full x16 speed you can only install and NVME drive in the top slot. If you add a NVME drive to ether M.2_2 or M.2_3 it will take lanes away from the PCIEx16_1 slot. You can however install NVME drives into slots M.2_4 and M.2_5 that run off a chipset and will not steal lans from the PCIEx16_1 slot
@49 seconds you point to the lower bottom two m.2 drives and say use those at Gen 4 and it won’t take lanes from GPU, is that 100% accurate, ie only using the two lower m.2 slots ? Thanks 🙏
hello Sorry, I am sending a message from Iran and my English is not good What I noticed is that this motherboard has 5 M.2 SSD slots My question is that in order to maintain the speed of the graphics card Slot, we should not use M2_3 , right? We Can Use 4 Gen4 M.2 SSD In M2_1 , M2_2 , M2_4 , M2_5 ?
Even if it does reduce the GPU slot to x8, it is PCi-e gen5 right, if you install a rtx 5080 or 5090 in it ? So, a Pci-e gen 5 GPU in x8 mode, should be as fast as a PCi-e Gen4 GPU in x16 mode.... or am i wrong ? If i am right, i do not think x8 will do much damage. PCI-E 5 is twice the bandwidth of PCI-E 4. A PCI-E 5.0 slot running at x8 will still be 16 GT/s, provided you use a PCI-E Gen 5 GPU. Do you think a rtx 4090 is limited by PCI-E 4.0 ? I currently run 5 NVME M.2 drives on my z690 mb, and i am still seeing "x16" in GPU-Z "bus interface". One of the disks is on a PCI-e card. I also have a Hyper Asus 4 slot card in my shed in case i want to run 8 NVME M.2 drives :-) But i think adding that card will take some lanes. :-(
@@Anders357 the 4090 running at gen 4 8x was only 2% slower (10 frames or less) than 16x. The 5090 will not saturate the gen 4 16x bandwidth so zero chance you even need 16x gen 5 for a few years yet.
Well you could opt for a larger m.2 drive. These days you can buy 8tb drives for 700-900 dollars or euros. But yes pcie gen 5 is way faster than gen4. I think you wont notice it but Im not making any comments about rtx 5090 usage.
@will.5642 the only reason faster drives will be important is direct storage for games. Running normal programs and OS off a gen 4 drive is plenty fast.
@prototypep4 I dont know. Maybe next gen games or highly specific games but generally I dont think you will notice it. I could be wrong! if you are dealing with high GB files you then you will see a benefit.
So I can either connect a Samsung 980 Pro 250 GB M.2-2280 PCIe 4.0 X4 NVME Solid State Drive or Crucial T700 4 TB M.2-2280 PCIe 5.0 X4 NVME Solid State Drive to it right?
im a little confused about lane sharing, if I buy any x870/e and only use 2 SSDs will most of them lane share now? I dont remember lane sharing every really being a concern with only 2
my question is.. if my 7900x offers only 24 lanes. and im using the GPUx16 and 2 m.2's,.. there go my 24 lanes.. where does the chipsets grab aditional lanes from? please teach. Thnak you
Nice use of the slim sas port. I have this board im about to build with a 9800x3d cpu. Can u tell me which 3 of the ssd ports i should use to not take any lanes? I have 3 ssds i plsn on using and may add this as well. Thank u for sharing this very helpful information!
Professional question: with the Crosshair x870E hero motherboard. And with the intent of using a single NVMe SSD; how might connecting my P5800x u.2 Optane-> SlimSAS port, compare to a m.2 redriver to gen-z EDSFF 1c -> u.2(connected to m.2_1)? I’m currently running the latter but feel as though the 9800x3d SHOULD (and CAN) be able to push far more IOPS than I am actually getting. Might I expect many more IOPS with the foremost solution? With regards to lane/bandwith occupancy. -this is independent of the suspected decrease in latency, because of SlimSAS being specifically optimized for latency.
@novver if I'm reading the manual correctly. I believe you can use 4 slots. M.2_1, M.2_2, M.2_4, and M.2_5. As long as 2 and 3 aren't used simultaneously, and 3 isn't used at all. 3 being used lane shares with PCIE 1 dropping it to x8, 2 and 3 being used disables PCIE 2. Which i suppose wouldn't be a issue if it's not in use.
If Ur using a 4000 series GPU then U can populate all Nvme slots because gen 5 x8 is more then enough even for a 4090, but soon as U upgrade to 5000 series Nvidia GPUs such as a 5080 onwards then Ur gonna have loss of performance issue we don't know how much performance we will loose
For the Hero, if you download the manual, on pg 9 it gives info for the M.2s. You could use M.2_1, _4 or _5. However, since you have 2 gen 4 drives, I would not waste the gen5 slot and would use 4 and 5 (the bottom 2 slots - see the M.2 layout diagram in the manual on pg 15). If you use M.2_2 or _3 (both gen5), they share lanes with the gpu and it will run at x8 instead of x16. Hope this is helpful.
@@RKBenchmarker HI I had a question . If we use slots number 1, 2, 4, and 5 to install four Gen 4 SSDs, like the Samsung 990 Pro, will the speed of the graphics card decrease To x8?
@alirezashakouri1569 Yes, x8 because of M.2_2. If you put any M.2 in slot _2 (gen3, gen4, anything) , it shares lanes with pcie_1 and will cut lanes to 8.
Doesn't it only take lanes from the 2nd X16 slot on the motherboard even if you populate every slot with SSDs? Also why wouldnt they let you choose which lanes of PCI-e you want to deactivate? Instead of just automatically removing lanes from your primary X16 slot
Yeah I have compared the motherboard manual for this x870e hero and the model below the Gaming wifi -e. It clearly says on the Wifi board that using both m.2 2 and 3 will drop the first x16 slot to 8x, but on the hero it clearly says it will just disable the second x16 slot. Also this motherboard has two gen 5 x16 slots not one gen 5 x16 slot and a gen 4 like the wifi. I appreciate this video and it's useful to know if I want to add a 6th m.2 drive, but his information is wrong I think. I am getting the board at the start of Jan along with a 9800x3d and I will reply back to this comment and let you know if I was correct.
@@Stanl3h Fortunately for you, I actually already have this board (got it the day it came out) and have a 9800X3D as well (got that the day it came out as well). I currently have all 5 m.2 slots populated, for a total of 20TB of NVMe SSD storage. And am using an RTX 3080Ti right now running on PCI-E 4.0 x 8 bandwidth. If there is any real performance impact from it, it's not more than 1-2%. The performance gains I've gotten from switching to a 9800X3D and the AM5 platform have still been far higher than any potential losses due the lower X8 bandwidth for the GPU. I'd consider it to be negligible. That being said, this is also only a temporary situation. I fully intend on putting a 5090 in there as soon as I can. Which I expect to support PCI-E 5.0, and assuming it does, then worst case I will still be going from running my 3080Ti with PCI-E 4.0 x 8 to running a 5090 with PCI-E 5.0 x 8. And since PCI-E 5.0 is double the bandwidth of PCI-E 4.0, then PCI-E 5.0 x 8 should provide bandwidth equivalent to PCI-E 4.0 x 16. And I would be very surprised if the 5090 experiences any sort of bottleneck in performance when running on a computer with PCI-E 4.0 x 16. So considering that, I think I should be able to keep all the M.2 slots populated and run the 5090 in PCI-E 5.0 x 8 mode without being bottlenecked or having any performance loss due to it not using PCI-E 5.0 X 16.
@@e2rqey Ok well that's disappointing, I have a follow up question, the manual says if you use m2 slot 3 it drops pcie 1 down to 8x, is the same if I use the second m.2 slot?
Are your 4 NVMe's all running at 5.0? Doesn't the 870E hero motherboard support up to 5 NVMes itself up from 4 on the X670E, so an extra 5.0 one and I guess this sas would make it 6 NVMes technically? I personally don't currently see much benefit of most gen 5 NVMe's besides your boot drive. As for a storage drive the heat is too high, cost too much and not a large enough difference to justify 2x the price vs say a Samsung 4TB 990 Pro which is 4.0 and 7GB/s
That is simply not possible, the AM5 x870e chipset platform is 44/24 (44 total pcie lanes 24 of which are gen5) 16 for the GPU, 4 for the USB 4.0 (mandatory for all x870e boards) that leaves only 4 for 1 nvme gen5 ssd for a total of 24. If a motherboard adds anymore gen5 ssds it would take lanes from the 16 GPU lanes. Taking lanes from a GPU doesn't work like taking 4 out of 16 and leaving 12 for it. The GPU either runs at 16 or 8. Now the x870e crosshair hero provides 5 nvmes slots (3 Gen5 and 2 Gen4). You can use the top Gen5 and the 2 Gen4 nvmes without lane sharing, but if you want to use the other 2 gen5 nvmes (1 or both of them it doesn't matter) they will take lanes from the 16 gpu. The slimSAS method shown in the video adds 1 more Gen4 ssd for a total of 4 nvme ssds (1 Gen5, 3 Gen4) without GPU lane sharing.
To avoid PCIe GPU lane sharing on the ASUS ROG Crosshair X870E Hero motherboard, it is crucial to understand the allocation of PCIe lanes. The Ryzen 9000 Series CPUs have 24 PCIe 5.0 lanes, with 16 typically allocated to the GPU. Using multiple M.2 slots connected directly to the CPU can impact this allocation. For instance, using more than two M.2 slots at x4 speed each can reduce the available lanes for the GPU, potentially dropping it from x16 to x8. To maintain a full x16 configuration for the GPU, limit the use of M.2 slots directly connected to the CPU to two slots at most. The X870E Hero has five M.2 slots, but only using the first two PCIe 5.0 x4 slots ensures that the GPU retains its full x16 bandwidth. Avoid using expansion cards that add additional M.2 slots, as these can also reduce the GPU's PCIe lanes. By carefully managing the M.2 slot usage, you can ensure that your GPU operates at its full potential without lane sharing.
Actually, the manual shows that if either M.2_2 or _3 is used, then the gpu will run at x8. Keep in mind that WE do not have 24 gen 5 lanes available to use; WE only have 16, so if we use just an x4 M.2 that share lanes, it will drop the pcie_1 to x8.
@@nucl3arboNgNo, it very much is true, the manual is lying. ASUS can't give you more than one CPU SSD without GPU lane sharing, it is quite literally physically impossible to do so due to the USB4 controller stealing 4 lanes.
@nucl3arboNg look at pg 15 and column 4. Remember, you only have 16 lanes, so if you use either one, your gpu will drop to x8. You can test this and see the number of lanes your gpu is using in gpu-z
I realize that theres not a chance in the world even with pcie 5 GPUS coming out that it would come close to saturating the lanes but knowing it split the lanes unless I do a workaround like you did kind of doesnt sit right with me :(. Too early to tell since the GPUs arent even out to test Motherboards that split the lanes vs motherboards that dont have the lane at all.
@@RKBenchmarker The top MSI and ASUS boards do. Haven't checked any others but I'm sure they have multiple x16 slots. You'd have to tell me the platform you're using/planning to use then I could tell you what board(s).
@@jabronilifestyle The second pcie slot in all the x670e and x870e top boards are x8 or x4 (lanes). You will not find a PCIE_2 with 16 lanes (talking about pcie lanes, not physical slot size) with a switch. And I own or have owned most of those boards from both Asus and MSI. Also, the manuals are clear as to what they offer and where to put the gpu as well. Perhaps when you saw pcie_2 x16 you thought it was lanes, but that was referring to the slot size. For example, the Asus Extreme manual says: "2x PCIe 5.0 x16 slots (supports x16 or x8/x8 modes)." So, it even specifies "slot" size and then lanes available per pcie slot. You never see a listing for 0/x16, but instead, x16/0 or x8/x8. And, other brands that actually have a block diagram show this visually. Hope that is helpful for someone.
Or....save yourself money on a motherboard and get the ASRock X870E Nova and get FIVE M.2 slots with no tricks needed to keep all lanes going and no lane sharing from the GPU.
Though that is true, keep in mind that using M.2-5 shares lanes with pcie_3 and will disable it. Also, if you use M.2_5, it is a gen3 x2 slot and will run very slow compared to the others. So, I would use it last and with a gen 3 drive.
@@RKBenchmarker well...with what I am intending to use my board for, the lowest drive on the board would only be used for file storage anyway. Not anything like running active programs or games or anything. And even at the "slower" speeds, I seriously doubt the "average joe" is going no notice the difference at all anyway.
The x870e hero is a downgrade from x670e hero. No lane sharing issues with x670e hero which is why i returned the x870e hero. Fewer usb ports on x870e because those pcie lanes are used for slimsas. X670e hero has an additional x4 pcie slot instead of only two for expansion slots on x870e hero. There is no change between x870e and x670e chipsets so why pay more for less features?
How to avoid? buy x670e and avoid gimmicky quick connects which might break the gpu. ps. x870e hero has less ports than x670e hero which is kinda sad considering they sell at same price
I'm writing this as a 😉 Asus RoG customer who has used their Boards fir almost 12 Years 😏 this question🤔 i would say thats an easy one🎉simply by buying a AsRock X870E Taichi / Light or Nova Wifi ...the regular Taichi is even build better, with better components on the Board😌👌🏻 instead of a fancy display on the io cover 😋😅 sorry don't be to harsh on me ...and back watching the Video 🙂
The components are great on both boards. The TaiChi unfortunately only uses the 160MHz Wifi7 version, cutting in half the actual speed... while the Hero uses the 320MHz version. There are many other factors as well, but I'm curious what you have noticed about the TaiChi that is better than the Hero? Thanks
@@79cachepomdua In most cases lane sharing is not a problem, it gives choices. For example, a mobo that offers 3 M.2s with no lane sharing compared to a board that offers 4 M.2s but if you use the 4th one, it shares lanes with something. You can still run 3 M.2s just like the other board that only has 3, but you have options. ----- Answering your question, the Nova's M.2_5 shares lanes with PCIE_3... so one or the other is disabled. But in this case, they provide 4 M.2s with no lane sharing at the cost of the bottom 2 PCIE slots being x1 and x2. So, if I needed to run a 4k/60 capture card on the Nova, I would not be able to as it needs 4 lanes (PCIE x4). ---- The TiaChi's 2nd PCIE_2 shares lanes with PCIE_1. So, if you populate the pcie_2 (x8), it will cut in half your gpu lanes to x8. This is not a big drop in performance though (no where near half, just a few fps). And, if you use an upcoming 50-series gpu, cutting it down to x8 will have no effect as we cannot saturate it at this point in time.
Why people just don't buy 3x 8TB Gen5 SSD? /s We have microSD cards (you know the ones that are the size of your feet pink toe nail) that are 2 TeraBytes now. SSDs still stuck at outrages prices for 8 TeraBytes, technology wise there is capability of already making 50 TeraBytes M.2 SSDs.
Sandisk Extreme Pro 1TB mSD Card for 115 Dollars. Up to 200Mb/s. This is not really fast (Still impressive). 2TB mSD card goes for more than 300 Euros right now and only can up to 250Mb/s. And these are the really fast ones. Cheaper ones do 100 or less Mb/s. I get a 2TB M.2 SSD for 99 Euros after Tax that does up to 7000Mb/s of reading and 6000Mb/s writing. Or a cheaper Kingston M.2 with 1TB for 54 Euros after Tax that does 3500Mb/s. In games this will not be utilized. But what are we talking about? That is not meant mean, but more interested, what you mean. You can't just break open SD-Cards and solder them in line. M.2 SSDs are so damn cheap at the moment. Also, consider cooling. New and fast M.2s get really hot and sometimes need passive Heatspreaders.
@@mynickisalreadytaken I gave a technology storage density state example, you are giving a speed to price break down, we are not talking about the same topic. For the space a microSD card take to hold 2TeraBytes, you could fit multiple of that space into a single flash die. I am talking about density not about price and speed, the speed and price you gave examples of I clearly agree with.
@@misael4096 I'm waiting for the Godlike as it finally lives up to its name and it is the only thing that will give me a true upgrade. Although I might also purchase the Taichi today just to have an AsRock bios to play with.
Just buy an X670E board, there is absolutely no reason to buy an X870(E) board. Apart from the USB4 controller actively making it worse, they are completely identical.
It's a 1 min ad, and you should be happy for the guy that he's doing well enough to secure some ads. You're getting to watch the content and benefit from it for free. Show some appreciation mate.
@@MajinOthinus Have you even watched the video? He does it right Infront of you. He added another M.2. And then he tried the Capture Card. It all worked. What are you talking about?
I plan on using 3 M.2 in this board. Already checked how to do so without lane sharing. This board is awesome!
My real question is why do you even care? Do you know the difference between 8x and 18x and how it relates to performance?
@prototypep4 i do and i still care about unlocking the full potential and not cause bottlenecks.
Why does it matter to you?
@@novver bottlenecks 🤣🤣🤣 ok bro. Enjoy your 2 extra fps.
@@prototypep4 i will
@@prototypep4 on a 4090 it's 2% loss if you are planing to buy a 5090 and the card is still in PCIE 4.0 it will be more... it make sense since most of that MB users will use 4090 or 5090...
Good afternoon GTR. I just wanted to say thank you. After seeing this video, I checked our Pcie 16x with the Rx7900xtx oc. And it showed x8. I was so confused. This is the z790 Godlike m/b. But I remember when I bought the 2 Crucial T705's. One 2tb and the other 4tb. I placed them in slot M.2_4 and M.2_5. The manual saved in fine print that if I used M.2_4 It will lane share and reduce 16x to 8x. So I moved slot 4 to slot 1 closest to the cpu which it should have anyway because of booting. I originally did this because it said slot 4 Gen5. But thanks again it resolved the situation and verified with Cpuid. This Channel is awesome. Can't wait until Paint time. Lol.
More than 2x nvme = M2_1, M2_4 and M2_5
No change for the 1st PCIe 5.0 x16 slot to x8.
For 2 m2 take M2_1 and and M2_4 so 0 problems for your PCIe 5.0 x16 slot
Only the temperature can be a problem for a PCIe 5.0 m2 under load
Just the video I need. Gonna buy this mobo with the RTX 5090 next year!
This solution will cause another issue, pcie 5.0 will be extremely hot
@@R6ex I have this MB and it works quite steady. It does require a Bios update for the memory to work. Also first start up (after bios update)it will do a memory test and it might take a few minutes. Just walk away.
To get PCIEx16_1 to run at the full x16 speed you can only install and NVME drive in the top slot. If you add a NVME drive to ether M.2_2 or M.2_3 it will take lanes away from the PCIEx16_1 slot.
You can however install NVME drives into slots M.2_4 and M.2_5 that run off a chipset and will not steal lans from the PCIEx16_1 slot
so if I'm only using 1 drive I'm good?
@49 seconds you point to the lower bottom two m.2 drives and say use those at Gen 4 and it won’t take lanes from GPU, is that 100% accurate, ie only using the two lower m.2 slots ? Thanks 🙏
I just need 2 NVMEs so how do I keep my full 16 lanes for my GPU
do i also have this issue if i only run 1 GPU (4080 super) and use 1 m2?
Obviously not.
4080s is gen4
Thank you for this! Liked and subbed!
Waiting for an upgrade bundle including this mobo to arrive from ocuk. Will absolutelly save this video for when it arrives 👍
So if i have 2 ssds and an hdd am i good?
hello
Sorry, I am sending a message from Iran and my English is not good
What I noticed is that this motherboard has 5 M.2 SSD slots
My question is that in order to maintain the speed of the graphics card Slot, we should not use M2_3 , right?
We Can Use 4 Gen4 M.2 SSD In M2_1 , M2_2 , M2_4 , M2_5 ?
If you want to maintain x16 lanes to the GPU slot, you cannot use M2_2 and M2_3. You can use M2_1, M2_4, M2_5, and the slimSAS as shown in the video.
@@GameTechReviews Thank You 🤩
Even if it does reduce the GPU slot to x8, it is PCi-e gen5 right, if you install a rtx 5080 or 5090 in it ?
So, a Pci-e gen 5 GPU in x8 mode, should be as fast as a PCi-e Gen4 GPU in x16 mode.... or am i wrong ?
If i am right, i do not think x8 will do much damage.
PCI-E 5 is twice the bandwidth of PCI-E 4. A PCI-E 5.0 slot running at x8 will still be 16 GT/s, provided you use a PCI-E Gen 5 GPU.
Do you think a rtx 4090 is limited by PCI-E 4.0 ?
I currently run 5 NVME M.2 drives on my z690 mb, and i am still seeing "x16" in GPU-Z "bus interface". One of the disks is on a PCI-e card.
I also have a Hyper Asus 4 slot card in my shed in case i want to run 8 NVME M.2 drives :-) But i think adding that card will take some lanes. :-(
You essentially right even PCIE5 x8 will not be saturated by the even RTX 5090 at max bitrate.
@@Anders357 the 4090 running at gen 4 8x was only 2% slower (10 frames or less) than 16x. The 5090 will not saturate the gen 4 16x bandwidth so zero chance you even need 16x gen 5 for a few years yet.
Well you could opt for a larger m.2 drive. These days you can buy 8tb drives for 700-900 dollars or euros.
But yes pcie gen 5 is way faster than gen4. I think you wont notice it but Im not making any comments about rtx 5090 usage.
@will.5642 the only reason faster drives will be important is direct storage for games. Running normal programs and OS off a gen 4 drive is plenty fast.
@prototypep4 I dont know. Maybe next gen games or highly specific games but generally I dont think you will notice it. I could be wrong! if you are dealing with high GB files you then you will see a benefit.
So I put one in slot above the gpu and then first 2 slots under the gpu. When I enable expo 1 the first slot on bottom left won’t show up anymore
All three drives will work but in that configuration, the GPU will run at x8.
@@GameTechReviews if I just run x2 gen 4 do u know the best configuration to make everything run at max?
@@Evilbigboss101ye i also want answer, but there no answer from video guy :(
So I can either connect a
Samsung 980 Pro 250 GB M.2-2280 PCIe 4.0 X4 NVME Solid State Drive or Crucial T700 4 TB M.2-2280 PCIe 5.0 X4 NVME Solid State Drive to it right?
Which x870e doesn't share m.2 and gpu lanes?
all of the asRock.. Nova. Tachi.. Tachi Lite.. they do NOT share lanes between GPU and M.2
None with more than one PCIe 5.0 SSD. X870E is just a downgraded version of X670E thanks to USB4, otherwise it is completely identical.
The Nova like the previous commentator said and also the upcoming NZXT N9 X870E does not have lane sharing.
@@misael4096 I co-sign Asrock, excellent boards
@@misael4096 plus the Riptide!
So why a 700 hundreds motherboard doesn't include this converter to add SSD disk without taking Lanes from the GPU,😑
I want to use the creative AE5 Soundcard with the mainboard will it affect my GPU in the PCI slot ?
Yes, if you plug anything into the 2nd slot the top slot will run at x8.
@ does it make a big difference if my GPU is not running in 16x and only in 8x ?
Nice tutorial ! But for games storage only, would I see a significant difference in performance between this and a 2.5" sata III solid state drive ?
Awesome vid👍🏽
so, if i have the 870e crosshair hero is it possible to do this:
pcie 5.0 gpu 1 - x16
m.2_1 pcie 5 - x4
m.2_2 pcie 5 - 4
Yes. Also use 1 and 2 slots for the heatsink.
im a little confused about lane sharing, if I buy any x870/e and only use 2 SSDs will most of them lane share now? I dont remember lane sharing every really being a concern with only 2
my question is.. if my 7900x offers only 24 lanes. and im using the GPUx16 and 2 m.2's,.. there go my 24 lanes.. where does the chipsets grab aditional lanes from? please teach. Thnak you
It would have been faster for you to search this up - the CPUs have 28 lanes, four of which go to the first chipset.
@@Tarkhein im lazy... dont judge me
isn't it GPU runs at PCI Gen 5 at X8, which is basically PCI Gen 4 at x16? (If you populate Gen5 NVME's)
If you plug in a 10g Nic into the 2nd pcie slot, does the top slot get downgraded from x16 to x8?
Yes
Nice use of the slim sas port. I have this board im about to build with a 9800x3d cpu. Can u tell me which 3 of the ssd ports i should use to not take any lanes? I have 3 ssds i plsn on using and may add this as well. Thank u for sharing this very helpful information!
Professional question: with the Crosshair x870E hero motherboard. And with the intent of using a single NVMe SSD; how might connecting my P5800x u.2 Optane-> SlimSAS port, compare to a m.2 redriver to gen-z EDSFF 1c -> u.2(connected to m.2_1)? I’m currently running the latter but feel as though the 9800x3d SHOULD (and CAN) be able to push far more IOPS than I am actually getting. Might I expect many more IOPS with the foremost solution? With regards to lane/bandwith occupancy. -this is independent of the suspected decrease in latency, because of SlimSAS being specifically optimized for latency.
So, If I want to use 2 NMVe I will need to use this in order to avoid lane sharing?
You can use3 without the need for this. Check the manual.
@@novverthanks, I see that I can use M.2_1, M.2_4 & M.2_5 in order to avoid PCIe lane sharing.
@@Altogrande Exactly. Happy building!
@novver if I'm reading the manual correctly. I believe you can use 4 slots. M.2_1, M.2_2, M.2_4, and M.2_5. As long as 2 and 3 aren't used simultaneously, and 3 isn't used at all. 3 being used lane shares with PCIE 1 dropping it to x8, 2 and 3 being used disables PCIE 2. Which i suppose wouldn't be a issue if it's not in use.
If Ur using a 4000 series GPU then U can populate all Nvme slots because gen 5 x8 is more then enough even for a 4090, but soon as U upgrade to 5000 series Nvidia GPUs such as a 5080 onwards then Ur gonna have loss of performance issue we don't know how much performance we will loose
Very useful, thank you very much.
so u can use 2x 4.0 pcie en 2x 5.0 pcie m2 correct ?
Which m.2 slots can you use on the MB without lane sharing with the first x16 slot?
It was explained in the 1st minute of the video. Pay attention to where I point on the picture of the motherboard.
What Bios verison are you running with this board? I tried the latest 0606 and I blue screened on almost every game
I got this board too and alot of bad reviews on this one. Kinda sucks at that price point ! Hope asus figured out a new bios update soon !!!
Do any other X870E boards also have SlimSas? Like from MSI?
Your pcie 5.0 will be extremely hot in this box
If I only use 2 x Gen.4 (Samsung 990 Pro) then what slots should I populate you think?
For the Hero, if you download the manual, on pg 9 it gives info for the M.2s. You could use M.2_1, _4 or _5. However, since you have 2 gen 4 drives, I would not waste the gen5 slot and would use 4 and 5 (the bottom 2 slots - see the M.2 layout diagram in the manual on pg 15). If you use M.2_2 or _3 (both gen5), they share lanes with the gpu and it will run at x8 instead of x16. Hope this is helpful.
In the two at the very bottom of the motherboard.
@@RKBenchmarker HI
I had a question .
If we use slots number 1, 2, 4, and 5 to install four Gen 4 SSDs, like the Samsung 990 Pro, will the speed of the graphics card decrease To x8?
@alirezashakouri1569 Yes, x8 because of M.2_2. If you put any M.2 in slot _2 (gen3, gen4, anything) , it shares lanes with pcie_1 and will cut lanes to 8.
Thanks. @@RKBenchmarker
Can this be used on the strix x870e-e!?
Really ? It doesn't have a slim saas port
@ gotcha
Doesn't it only take lanes from the 2nd X16 slot on the motherboard even if you populate every slot with SSDs?
Also why wouldnt they let you choose which lanes of PCI-e you want to deactivate? Instead of just automatically removing lanes from your primary X16 slot
Yeah I have compared the motherboard manual for this x870e hero and the model below the Gaming wifi -e. It clearly says on the Wifi board that using both m.2 2 and 3 will drop the first x16 slot to 8x, but on the hero it clearly says it will just disable the second x16 slot. Also this motherboard has two gen 5 x16 slots not one gen 5 x16 slot and a gen 4 like the wifi.
I appreciate this video and it's useful to know if I want to add a 6th m.2 drive, but his information is wrong I think.
I am getting the board at the start of Jan along with a 9800x3d and I will reply back to this comment and let you know if I was correct.
@@Stanl3h Fortunately for you, I actually already have this board (got it the day it came out) and have a 9800X3D as well (got that the day it came out as well). I currently have all 5 m.2 slots populated, for a total of 20TB of NVMe SSD storage. And am using an RTX 3080Ti right now running on PCI-E 4.0 x 8 bandwidth. If there is any real performance impact from it, it's not more than 1-2%. The performance gains I've gotten from switching to a 9800X3D and the AM5 platform have still been far higher than any potential losses due the lower X8 bandwidth for the GPU. I'd consider it to be negligible.
That being said, this is also only a temporary situation. I fully intend on putting a 5090 in there as soon as I can. Which I expect to support PCI-E 5.0, and assuming it does, then worst case I will still be going from running my 3080Ti with PCI-E 4.0 x 8 to running a 5090 with PCI-E 5.0 x 8.
And since PCI-E 5.0 is double the bandwidth of PCI-E 4.0, then PCI-E 5.0 x 8 should provide bandwidth equivalent to PCI-E 4.0 x 16. And I would be very surprised if the 5090 experiences any sort of bottleneck in performance when running on a computer with PCI-E 4.0 x 16.
So considering that, I think I should be able to keep all the M.2 slots populated and run the 5090 in PCI-E 5.0 x 8 mode without being bottlenecked or having any performance loss due to it not using PCI-E 5.0 X 16.
@@e2rqey Ok well that's disappointing, I have a follow up question, the manual says if you use m2 slot 3 it drops pcie 1 down to 8x, is the same if I use the second m.2 slot?
x870e 중 유일하게 슬림사스 포트가 있는 히어로 마더보드 좋네요, 슬림사스 포트로 HDD or captureboard or NVME 취향대로 추가 사용 가능하니 히어로 보드만의 엄청난 메리트네요
Thank you for sharing i bought this motherboard also!
Same! ;)
Are your 4 NVMe's all running at 5.0? Doesn't the 870E hero motherboard support up to 5 NVMes itself up from 4 on the X670E, so an extra 5.0 one and I guess this sas would make it 6 NVMes technically? I personally don't currently see much benefit of most gen 5 NVMe's besides your boot drive. As for a storage drive the heat is too high, cost too much and not a large enough difference to justify 2x the price vs say a Samsung 4TB 990 Pro which is 4.0 and 7GB/s
That is simply not possible, the AM5 x870e chipset platform is 44/24 (44 total pcie lanes 24 of which are gen5) 16 for the GPU, 4 for the USB 4.0 (mandatory for all x870e boards) that leaves only 4 for 1 nvme gen5 ssd for a total of 24.
If a motherboard adds anymore gen5 ssds it would take lanes from the 16 GPU lanes. Taking lanes from a GPU doesn't work like taking 4 out of 16 and leaving 12 for it. The GPU either runs at 16 or 8.
Now the x870e crosshair hero provides 5 nvmes slots (3 Gen5 and 2 Gen4). You can use the top Gen5 and the 2 Gen4 nvmes without lane sharing, but if you want to use the other 2 gen5 nvmes (1 or both of them it doesn't matter) they will take lanes from the 16 gpu.
The slimSAS method shown in the video adds 1 more Gen4 ssd for a total of 4 nvme ssds (1 Gen5, 3 Gen4) without GPU lane sharing.
hey, great video. Would you be able to connect a 10g network card using a SlimSAS Adaptor?
THANK YOU
To avoid PCIe GPU lane sharing on the ASUS ROG Crosshair X870E Hero motherboard, it is crucial to understand the allocation of PCIe lanes. The Ryzen 9000 Series CPUs have 24 PCIe 5.0 lanes, with 16 typically allocated to the GPU. Using multiple M.2 slots connected directly to the CPU can impact this allocation. For instance, using more than two M.2 slots at x4 speed each can reduce the available lanes for the GPU, potentially dropping it from x16 to x8.
To maintain a full x16 configuration for the GPU, limit the use of M.2 slots directly connected to the CPU to two slots at most. The X870E Hero has five M.2 slots, but only using the first two PCIe 5.0 x4 slots ensures that the GPU retains its full x16 bandwidth. Avoid using expansion cards that add additional M.2 slots, as these can also reduce the GPU's PCIe lanes. By carefully managing the M.2 slot usage, you can ensure that your GPU operates at its full potential without lane sharing.
Actually, the manual shows that if either M.2_2 or _3 is used, then the gpu will run at x8. Keep in mind that WE do not have 24 gen 5 lanes available to use; WE only have 16, so if we use just an x4 M.2 that share lanes, it will drop the pcie_1 to x8.
@RKBenchmarker That is not true the manual says if they are used together, not if "either". I'm building with this board today and looking at it now.
@@nucl3arboNgNo, it very much is true, the manual is lying. ASUS can't give you more than one CPU SSD without GPU lane sharing, it is quite literally physically impossible to do so due to the USB4 controller stealing 4 lanes.
@nucl3arboNg look at pg 15 and column 4. Remember, you only have 16 lanes, so if you use either one, your gpu will drop to x8. You can test this and see the number of lanes your gpu is using in gpu-z
Can I use a capture card in the second PCI slot without compromise the lanes of the first one?
Is the case Deepcool CH560?
At 6:22 he says the case he is using
@@RKBenchmarker thanks
I realize that theres not a chance in the world even with pcie 5 GPUS coming out that it would come close to saturating the lanes but knowing it split the lanes unless I do a workaround like you did kind of doesnt sit right with me :(. Too early to tell since the GPUs arent even out to test Motherboards that split the lanes vs motherboards that dont have the lane at all.
Even RTX 5090 will not saturate PICE5 x8 lanes in most cases...
Ssd stay in your lane. Lol. With GPU prices today, it better not share a lane.
It's not really a problem if PCIe 5.0 x16 drop to x8. Because for 4090 it's 3% that she lost from x16 to x8
Can I plug my GPU in this motherboard in either top or bottom PCI express slot as they both has 16 lanes?
You always want to use the top slot for your main gpu. The second slot is x8 (8 lanes), but the physical length of the slot is 16.
@@RKBenchmarker some boards have x16 on multiple slots via switch or jumper or even bios. You don't always want to use the top, just usually.
@@jabronilifestyleWhat boards did you have in mind? Anything recent?
@@RKBenchmarker The top MSI and ASUS boards do. Haven't checked any others but I'm sure they have multiple x16 slots. You'd have to tell me the platform you're using/planning to use then I could tell you what board(s).
@@jabronilifestyle The second pcie slot in all the x670e and x870e top boards are x8 or x4 (lanes). You will not find a PCIE_2 with 16 lanes (talking about pcie lanes, not physical slot size) with a switch. And I own or have owned most of those boards from both Asus and MSI. Also, the manuals are clear as to what they offer and where to put the gpu as well. Perhaps when you saw pcie_2 x16 you thought it was lanes, but that was referring to the slot size. For example, the Asus Extreme manual says: "2x PCIe 5.0 x16 slots (supports x16 or x8/x8 modes)." So, it even specifies "slot" size and then lanes available per pcie slot. You never see a listing for 0/x16, but instead, x16/0 or x8/x8. And, other brands that actually have a block diagram show this visually. Hope that is helpful for someone.
Or....save yourself money on a motherboard and get the ASRock X870E Nova and get FIVE M.2 slots with no tricks needed to keep all lanes going and no lane sharing from the GPU.
Though that is true, keep in mind that using M.2-5 shares lanes with pcie_3 and will disable it. Also, if you use M.2_5, it is a gen3 x2 slot and will run very slow compared to the others. So, I would use it last and with a gen 3 drive.
out of stock everywhere tho
@@misael4096 Some MicroCenters have them in stock right now.
@@RKBenchmarker well...with what I am intending to use my board for, the lowest drive on the board would only be used for file storage anyway. Not anything like running active programs or games or anything. And even at the "slower" speeds, I seriously doubt the "average joe" is going no notice the difference at all anyway.
@@technewsfortechnoobs Right, it is just good for everyone to be aware of it. And you will be able to tell... there is a huge difference in speed.
The x870e hero is a downgrade from x670e hero. No lane sharing issues with x670e hero which is why i returned the x870e hero.
Fewer usb ports on x870e because those pcie lanes are used for slimsas.
X670e hero has an additional x4 pcie slot instead of only two for expansion slots on x870e hero.
There is no change between x870e and x670e chipsets so why pay more for less features?
How to avoid? buy x670e and avoid gimmicky quick connects which might break the gpu. ps. x870e hero has less ports than x670e hero which is kinda sad considering they sell at same price
runing your gpu at x8 with pci-e 5 is same as running it at x16 with pci-e 4
which gpu can now pcie gen 5?
There isn't any GPU's that support PCIe 5.0.
The 50-series is coming out soon @@NoClipMode
@@boss_demo2.0the 5000 series Nvidia cards
I'm writing this as a 😉 Asus RoG customer who has used their Boards fir almost 12 Years 😏 this question🤔
i would say thats an easy one🎉simply by buying a AsRock X870E Taichi / Light or Nova Wifi ...the regular Taichi is even build better, with better components on the Board😌👌🏻 instead of a fancy display on the io cover 😋😅 sorry don't be to harsh on me ...and back watching the Video 🙂
The components are great on both boards. The TaiChi unfortunately only uses the 160MHz Wifi7 version, cutting in half the actual speed... while the Hero uses the 320MHz version. There are many other factors as well, but I'm curious
what you have noticed about the TaiChi that is better than the Hero? Thanks
Taichi and Nova didnt share their PCIE lane, right, sir? I care about this problem, too
@@79cachepomdua In most cases lane sharing is not a problem, it gives choices. For example, a mobo that offers 3 M.2s with no lane sharing compared to a board that offers 4 M.2s but if you use the 4th one, it shares lanes with something. You can still run 3 M.2s just like the other board that only has 3, but you have options. ----- Answering your question, the Nova's M.2_5 shares lanes with PCIE_3... so one or the other is disabled. But in this case, they provide 4 M.2s with no lane sharing at the cost of the bottom 2 PCIE slots being x1 and x2. So, if I needed to run a 4k/60 capture card on the Nova, I would not be able to as it needs 4 lanes (PCIE x4). ---- The TiaChi's 2nd PCIE_2 shares lanes with PCIE_1. So, if you populate the pcie_2 (x8), it will cut in half your gpu lanes to x8. This is not a big drop in performance though (no where near half, just a few fps). And, if you use an upcoming 50-series gpu, cutting it down to x8 will have no effect as we cannot saturate it at this point in time.
The Taichi's have usb 2.0 😂 straight garbage
@@nucl3arboNg That's perfect for a keyboard and mouse.
*SlimSuS*
just buy asrock 870e it has no lane sharing with gpu
Why people just don't buy 3x 8TB Gen5 SSD? /s
We have microSD cards (you know the ones that are the size of your feet pink toe nail) that are 2 TeraBytes now.
SSDs still stuck at outrages prices for 8 TeraBytes, technology wise there is capability of already making 50 TeraBytes M.2 SSDs.
Sandisk Extreme Pro 1TB mSD Card for 115 Dollars. Up to 200Mb/s. This is not really fast (Still impressive). 2TB mSD card goes for more than 300 Euros right now and only can up to 250Mb/s. And these are the really fast ones. Cheaper ones do 100 or less Mb/s.
I get a 2TB M.2 SSD for 99 Euros after Tax that does up to 7000Mb/s of reading and 6000Mb/s writing. Or a cheaper Kingston M.2 with 1TB for 54 Euros after Tax that does 3500Mb/s. In games this will not be utilized. But what are we talking about? That is not meant mean, but more interested, what you mean.
You can't just break open SD-Cards and solder them in line. M.2 SSDs are so damn cheap at the moment.
Also, consider cooling. New and fast M.2s get really hot and sometimes need passive Heatspreaders.
@@mynickisalreadytaken I gave a technology storage density state example, you are giving a speed to price break down, we are not talking about the same topic.
For the space a microSD card take to hold 2TeraBytes, you could fit multiple of that space into a single flash die.
I am talking about density not about price and speed, the speed and price you gave examples of I clearly agree with.
Well guys keep your "Hero" ill buy a NOVA
It's good to have choices, especially good options that aren't $500+
where are you gonna buy the nova?
@@misael4096 I'm waiting for the Godlike as it finally lives up to its name and it is the only thing that will give me a true upgrade. Although I might also purchase the Taichi today just to have an AsRock bios to play with.
Just buy an X670E board, there is absolutely no reason to buy an X870(E) board. Apart from the USB4 controller actively making it worse, they are completely identical.
NOVA has slower DIMM slots so ok
i'm sorry but this board is overrated
x870e Taichi and Taichi lite do better
also x870e Carbon
both does better with lanes than this board
Just a 9 minute ad to get you to buy stuff on affiliate links.
This use case is very rare.
It's a 1 min ad, and you should be happy for the guy that he's doing well enough to secure some ads. You're getting to watch the content and benefit from it for free. Show some appreciation mate.
Very rare? You add a whole M.2 or a Capture Card. Plenty of reason.
@@AdamCountrymanAgain, you can not add expansion cards via SAS.
@@MajinOthinus Have you even watched the video? He does it right Infront of you. He added another M.2. And then he tried the Capture Card. It all worked. What are you talking about?
@@MajinOthinus Watch Frame Chasers "The BEST AMD Motherboard" at 10:28
I have a question, can I use an m2 on this card without reducing the gpu speed?
Yes