Optane performance on AMD vs Intel

[A Computer Guy]

Don't double adapter create their own latency problems?

I don't know. My understanding was each device uses x4 lanes, this card allows you to tap into the bifurcated x8(x4/x4) slot. You might want to check your bifurcation options first before making the purchase. For example my X570 Taichi will do x8/x8 or x8/x4/x4 or x4/x4/x4/x4 but my X570 Taichi Razer will only do x8/x8 or x8/x4/x4 for some reason making it a no go to use the first slot on the Razer.

 

[evernessince]

Any input on how I can fit my chonker 7900xtx in the second slot and preserve my third PCIE slot? It's so big it encroaches over the bottom slot.

Good chance I'll just live with it how it's functioning now because my gimped p5800x still destroys everything comparable.

Other than replacing the cooler on the video card or going liquid, none that I'm aware of.

32,000 is still pretty good, especially given that a huge chunk of that score where it matters (latency and random performance).

 

[Ferrum Master]

Any input on how I can fit my chonker 7900xtx in the second slot and preserve my third PCIE slot? It's so big it encroaches over the bottom slot.

I am actually hooking this riser from my bottom PCIe as it is blocked by radiator and fan, this riser is thin and I screw it up a bit... you can put it in vertical or whatever, use the smaller SFF bracket

 

[NSGYPA]

So I swapped my drive to PCIE_1 and moved my GPU down. Here's the results. HUGE gains.

can't believe my p5801x hit 1.56 million IOPS

 

[NSGYPA]

So I reinstalled my windows 11... got HUGE improvement. Not sure why (can someone help me explain???)

p5800x 800gb and p5801x 400gb, respectively.

 

[evernessince]

So I reinstalled my windows 11... got HUGE improvement. Not sure why (can someone help me explain???)

p5800x 800gb and p5801x 400gb, respectively.
View attachment 362092View attachment 362093

Your storage driver seems to have changed when you re-installed windows despite using the exact same hardware.

Looking up info on your old storage driver, it appears IAStorAC is a system driver associated with Intel Rapid Storage Technology (IRST). This driver handles RAID and ACHI.

The thing with RAID is that it tends to interact poorly with Optane so I have to wonder if simply using a RAID driver but not actually having RAID enabled could have resulted in lower than expected performance. Of course it could also just be Intel jank, after all IAStorAC is known to cause BSODs.

 

[NSGYPA]

Your storage driver seems to have changed when you re-installed windows despite using the exact same hardware.

Looking up info on your old storage driver, it appears IAStorAC is a system driver associated with Intel Rapid Storage Technology (IRST). This driver handles RAID and ACHI.

The thing with RAID is that it tends to interact poorly with Optane so I have to wonder if simply using a RAID driver but not actually having RAID enabled could have resulted in lower than expected performance. Of course it could also just be Intel jank, after all IAStorAC is known to cause BSODs.

Pretty interesting case study I suppose

 

[NDRE28]

Here's my P5800X 400GB anvil score for reference on a 7800X3D + X670 setup. This is with me using it as my main drive so the score is a bit lower than if I were benchmarking it as a separate drive. I got the full 40K when I first tested it before migrating my OS. I hammer this thing by training AI all the time and it's a real champ:

View attachment 361106



What slot is the card in though? It should be the top slot. Lower slots might work but it depends heavily on your motherboard.

I personally use the StarTech PCIe to u.2 card and it just works but that might simply because I have it in the top slot with my 4090 in the bottom slot.

In addition, you never specified if this is your OS drive. You are going to loose about 2,000 points when testing it while it's your OS drive and you'll loose additional performance if you have background tasks running. If you haven't already, try to ensure nothing is potentially interfering with the benchmark.



I assume you mean redriver here and not refrigerator. The m.2 adapters with the redrivers may require some fiddling with in order to get the signal to where you want it and the problem is unless you run Linux I'm not aware of any way to look at PCIe communication errors on windows. Wendel from Level1Techs was able to do so with Linux. He did a whole video on getting PCIe 4.0 U.2 drives to work and it's in general a PITA. Hence why I purchased the StarTech U.2 card as it was the easiest and most reliable option among those Wendel tested.

Hello!

I see that you are using the P5800X on an ASRock X670E Taichi motherboard.
I own the same motherboard model and I'd like to also buy the P5800X 400GB drive.

Question:
What type of adapter are you using?
Is it an adapter cable from U.2 to M.2, or is it an adapter card from U.2 to PCIe 4.0?

 

[R-T-B]

FWIW, I am using my P5800x on my system in system specs via M.2 to U.2 adapter and its working fine at pcie 4.0 with no visible difference from what an AMD OS install should bench at. Same scores as most of the rest of ya.

 

[evernessince]

Hello!

I see that you are using the P5800X on an ASRock X670E Taichi motherboard.
I own the same motherboard model and I'd like to also buy the P5800X 400GB drive.

Question:
What type of adapter are you using?
Is it an adapter cable from U.2 to M.2, or is it an adapter card from U.2 to PCIe 4.0?

I'm using the startech u.2 carrier card: https://www.amazon.com/gp/product/B072JK2XLC?psc=1

It has been flawless for me in the top PCIe slot. I have my GPU in the lower slot.

 

[NDRE28]

I'm using the startech u.2 carrier card: https://www.amazon.com/gp/product/B072JK2XLC?psc=1

It has been flawless for me in the top PCIe slot. I have my GPU in the lower slot.

OK.
Thank you.

 

[NDRE28]

FWIW, I am using my P5800x on my system in system specs via M.2 to U.2 adapter and its working fine at pcie 4.0 with no visible difference from what an AMD OS install should bench at. Same scores as most of the rest of ya.

Thanks for letting me know.

The M.2 to U.2 adapter, is a cable, right?
I've seen these adapter cables online:

1. Delock 62984 (M.2 M-Key To U.2 SFF-8639; 50cm; NVMe PCIe 4.0 x4).

2. Delock 64216 (M.2 M-Key To U.2 SFF-8639; 20cm; NVMe PCIe 4.0 x4).

My only fear about using adapter cables is that they introduce latency, due to the length of the cable.

 

[R-T-B]

My only fear about using adapter cables is that they introduce latency, due to the length of the cable.

They may. I'm using a CPU m.2 socket so may not notice it as bad, but increased latency is a possibility.

Anyways here is the one I used, but there may be ones with better q&a (mine is fine but the reviews on this are somewhat mixed).

https://www.amazon.com/DiliVing-SFF-8639-Drive-Adapter-Converter/dp/B0CKT12PS3/

The ones you posted may be better.

 

[Wirko]

Don't double adapter create their own latency problems?

I'd worry about other undesired effects, not latency. There may be signal degradation or inability to upgrade the link to Gen 4. I say upgrade because, in the process of establishing a PCIe link, it starts at Gen 1, tunes the link and checks the error rate, then upgrades to Gen 2, tunes the link and checks the error rate, and so on.

But latency? It's around 10 us in the best case for Optane. An electrical signal in wires or an optical signal in a fibre travels 1 km, and back, in that amount of time.

 

[NDRE28]

They may. I'm using a CPU m.2 socket so may not notice it as bad, but increased latency is a possibility.

Anyways here is the one I used, but there may be ones with better q&a (mine is fine but the reviews on this are somewhat mixed).

https://www.amazon.com/DiliVing-SFF-8639-Drive-Adapter-Converter/dp/B0CKT12PS3/

The ones you posted may be better.

Hi!

As I see it, the cable that you are using, and also the ones that I have mentioned, have a power connection, besides of the U.2 & M.2 connectors.
Are you plug-ing that connection into something, or are you just leaving it alone?

 

[R-T-B]

Hi!

As I see it, the cable that you are using, and also the ones that I have mentioned, have a power connection, besides of the U.2 & M.2 connectors.
Are you plug-ing that connection into something, or are you just leaving it alone?

I use the SATA power connector, yes.

 

[evernessince]

Thanks for letting me know.

The M.2 to U.2 adapter, is a cable, right?
I've seen these adapter cables online:

1. Delock 62984 (M.2 M-Key To U.2 SFF-8639; 50cm; NVMe PCIe 4.0 x4).

2. Delock 64216 (M.2 M-Key To U.2 SFF-8639; 20cm; NVMe PCIe 4.0 x4).

My only fear about using adapter cables is that they introduce latency, due to the length of the cable.

Your primary concern with PCIe 4.0 should be signal integrity as it is pretty finicky over distance unless the adapter you are using has a redriver. Cables add a negligible amount of latency. You will get more latency if you connect the drive to the chipset instead of the CPU.

Wendel from Level1Techs tested a bunch of cards and adapters with PCIe 4.0 drives and found that only some carrier cards worked well enough and adapters with redrivers by far had the highest success rate. The card I purchased was specifically from his recommendation.

It all depends on what percentage you want to leave up to chance. You can purchase one of the cable based options w/o redrive but just be prepared to purchase a different one in case it doesn't work at Gen 4 speeds.

 

[NDRE28]

I use the SATA power connector, yes.

OK.
That means that I need to also buy another cable and connect one side of that to the PSU and the other side to the SATA port of the cable that we spoke about earlier?

Your primary concern with PCIe 4.0 should be signal integrity as it is pretty finicky over distance unless the adapter you are using has a redriver. Cables add a negligible amount of latency. You will get more latency if you connect the drive to the chipset instead of the CPU.

Wendel from Level1Techs tested a bunch of cards and adapters with PCIe 4.0 drives and found that only some carrier cards worked well enough and adapters with redrivers by far had the highest success rate. The card I purchased was specifically from his recommendation.

It all depends on what percentage you want to leave up to chance. You can purchase one of the cable based options w/o redrive but just be prepared to purchase a different one in case it doesn't work at Gen 4 speeds.

Thanks.

The U.2 to PCIe 4.0 x4 adapter card is a no-brainer for me, unless you are limited by the space inside the PC case.
And I am pretty limited, since moving the video card in the 2nd PCIe slot, puts it very close to the bottom of the case, where the PSU is.

My case is: Fractal Design Meshify 2 RGB (it's an EATX case, but its height is really low), and my video card is Gigabyte RTX 3080 Vision OC, which is a pretty thick card.

 

[R-T-B]

That means that I need to also buy another cable and connect one side of that to the PSU and the other side to the SATA port of the cable that we spoke about earlier?

I think you can just straight connect your psus sata power cable?

 

[evernessince]

Thanks.

The U.2 to PCIe 4.0 x4 adapter card is a no-brainer for me, unless you are limited by the space inside the PC case.
And I am pretty limited, since moving the video card in the 2nd PCIe slot, puts it very close to the bottom of the case, where the PSU is.

My case is: Fractal Design Meshify 2 RGB (it's an EATX case, but its height is really low), and my video card is Gigabyte RTX 3080 Vision OC, which is a pretty thick card.

Ah I see, in my case (thermaltake core X9) putting the GPU in the bottom slot isn't an issue. In fact it let's it draw fresh air from outside.

That means that I need to also buy another cable and connect one side of that to the PSU and the other side to the SATA port of the cable that we spoke about earlier?

You can use your PSUs existing SATA cables to provide power to the M.2 to U.2. Unless you are saying that you don't have an extra SATA power cable.

 

[NDRE28]

Ah I see, in my case (thermaltake core X9) putting the GPU in the bottom slot isn't an issue. In fact it let's it draw fresh air from outside.



You can use your PSUs existing SATA cables to provide power to the M.2 to U.2. Unless you are saying that you don't have an extra SATA power cable.

My PSU is Corsair HX1200i, and I still have all of the items provided by the manufacturer, in the box.