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what is going on with my L3 Cache speed 46GB/s instead of over 650GB/s (5800X)

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i wanted to see how my memory latency was and compare it against other 5800Xs.

Memory, L1 and L2 Cache is fine and in spec.
but my L3 Cache is more than 90% slower than all other benchmarks show.

Windows 11 Pro, latest update (Beta, release candidate .194) (fresh install after i first saw this issue)
latest chipset driver, latest everything.
latest Bios (win 11 ready a84 bios from MSI (B550 Tomahawk)
no power saving modes, same results even with a manual OC.
no software running in the background, flashed the bios again with flashback.
latest version of AIDA64 (reinstalled two times)
reseated CPU, ram memtest, P95.

CB Scores are fine but games tend to stutter and heavily drop frames sometimes.


here is my result. (stock, just XMP)
MY Result.png


And this is how it should look like.
Reference.png
 

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CB Scores are fine but games tend to stutter and heavily drop frames sometimes.

Is the 5800X at completely stock settings?

A.84 (experimental 1203c) is still a beta BIOS isn't it? I'm still on A.30 on my Unify-X for that reason (stable 1203b). Might want to try A.70 with 1203b.

I'm not sure if you remember but I think I mentioned the problems with my old 2x16GB CJR kit to you once. Inexplicable stuttering that I threw the entire laundry list at for almost 2 years, only to fix it by switching to B-die. Not sure if it's of relevance here. I was also running a 3600 16-19-19 profile, but your latency seems a bit high at the same settings. I was about 59.9ns with a 5900X's 2CCD penalty? Subtimings shouldn't account for a 2-4ns difference, maybe 1ns tops on CJR.

CB shouldn't be affected, you'd be hard pressed to find a noticeable difference in R23 even dropping to JEDEC speed. It doesn't really care about memory.

edit: just saw you're on Win 11. 1203c is supposed to be designed for Win 11 support, but who knows if MS or AMD or MSI have borked something.

googling says AGESA ComboAM4v2 1.2.0.1 fixed the issue

iirc the L3 Aida "fix" around that time mainly for APUs that displayed ~1/2 L3 read speed? I would be stuck at like 300-400GB/s read while write and copy were normal at 600GB/s. As for the L3 here, it just looks like a bad BIOS for all the bandwidth to be that low. And I don't think the fix had to do with L3 latency, his L3 latency is worse than terrible.
 
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Is the 5800X at completely stock settings?

A.84 (experimental 1203c) is still a beta BIOS isn't it? I'm still on A.30 on my Unify-X for that reason (stable 1203b). Might want to try A.70 with 1203b.

I'm not sure if you remember but I think I mentioned the problems with my old 2x16GB CJR kit to you once. Inexplicable stuttering that I threw the entire laundry list at for almost 2 years, only to fix it by switching to B-die. Not sure if it's of relevance here. I was also running a 3600 16-19-19 profile, but your latency seems a bit high at the same settings. I was about 59.9ns with a 5900X's 2CCD penalty? Subtimings shouldn't account for a 2-4ns difference, maybe 1ns tops on CJR.

CB shouldn't be affected, you'd be hard pressed to find a noticeable difference in R23 even dropping to JEDEC speed. It doesn't really care about memory.

edit: just saw you're on Win 11. 1203c is supposed to be designed for Win 11 support, but who knows if MS or AMD or MSI have borked something.



iirc the L3 Aida "fix" around that time mainly for APUs that displayed ~1/2 L3 read speed? I would be stuck at like 300-400GB/s read while write and copy were normal at 600GB/s. As for the L3 here, it just looks like a bad BIOS for all the bandwidth to be that low. And I don't think the fix had to do with L3 latency, his L3 latency is worse than terrible.
I specifically saw people talking about this issue, thats how i knew to google the L3 issue and which agesa fixed it

At a guess, the beta bios broke it again
 
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Isn't this W11 issue? I remember seeing this mentioned in the W11 discussion thread.

 
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OP living under a rock, yet he is brave enough to use beta software.

First place one has to search these things is Feedback Hub and upvote it.

It is a known issue. Dev builds do not suffer from it, only beta so far. Wait for the final release otherwise.
 
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i don't know how long you guys are following MSIs Bios distribution for AMD but EVERY SINGLE LATEST BIOS will be called "Beta" until the next one arrives.
then it gets its beta tag removed. (like the previous one which was beta until A84 released.)

my PC takes ages to boot, shutdown and some games are barely playable.

It is a known issue. Dev builds do not suffer from it, only beta so far. Wait for the final release otherwise.
i tested my 10900k today and this issue does not exist. (on the same OS and SSD without any changes)
 
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i don't know how long you guys are following MSIs Bios distribution for AMD but EVERY SINGLE LATEST BIOS will be called "Beta" until the next one arrives.
then it gets its beta tag removed. (like the previous one which was beta until A84 released.)

my PC takes ages to boot, shutdown and some games are barely playable.
On top of that you're also running W11 beta.
 
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.194 is the release candidate and i wrote above that it only happens with an AMD CPU.
That's because it's probably some AGESA bs that can only be fixed by AMD releasing updated chipset driver for W11.
 
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That's because it's probably some AGESA bs that can only be fixed by AMD releasing updated chipset driver for W11.

How a Chipset driver influences a kernel behavior? Mhm?

It is a Win11 BETA BRANCH BUG.... if you have no idea how Microsoft divides their code base then do not use a product, that is not finished.

Here's more discussion about it that started in august.


i tested my 10900k today and this issue does not exist. (on the same OS and SSD without any changes)

Obviously if you test a different architecture you will not find anything as it is totally unrelated and AMD specific issue.

A honest question to all. Why are you not using feedback hub if you use a BETA product? What's the point?

1633346287465.png
 
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I have the same issue with my 5950X processor. Been looking at it for some time, it's not due to HVCI or virtualization-based security (though these place further penalties on the benchmark). My motherboard is very similar to yours, only a model up (B550-E), but I have friends who have been able to reproduce on the Crosshair 8 Dark Hero, Gigabyte B550 Aorus Master, B550i Aorus Pro AX etc.

It is not a beta BIOS issue, I can recall it happening at least since before the USB bugfix AGESA (so 1.2.0.0 at a minimum), and it does occur on the current stable BIOSes for the ROG Strix motherboards as well.

However, I would be lying if I felt the impact of this "issue", if it actually exists beyond AIDA64, because my experience has been fantastic thus far and all other benchmarks that I have run return normal results. I wonder if this is a bug with AIDA64 itself.

How a Chipset driver influences a kernel behavior? Mhm?

It is a Win11 BETA BRANCH BUG.... if you have no idea how Microsoft divides their code base then do not use a product, that is not finished.

I have actually been experiencing this on Windows 10 stable as well... and I would argue one can't call Windows 11 (22000) beta anymore. The RTM final code is available and running on most W11-equipped PCs right now. By all intents and purposes, what you see is what you will get on production systems shipping with the OS beginning tomorrow.
 
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I have the same issue with my 5950X processor. Been looking at it for some time, it's not due to HVCI or virtualization-based security (though these place further penalties on the benchmark). My motherboard is very similar to yours, only a model up (B550-E), but I have friends who have been able to reproduce on the Crosshair 8 Dark Hero, Gigabyte B550 Aorus Master, B550i Aorus Pro AX etc.

It is not a beta BIOS issue, I can recall it happening at least since before the USB bugfix AGESA (so 1.2.0.0 at a minimum), and it does occur on the current stable BIOSes for the ROG Strix motherboards as well.

However, I would be lying if I felt the impact of this "issue", if it actually exists beyond AIDA64, because my experience has been fantastic thus far and all other benchmarks that I have run return normal results. I wonder if this is a bug with AIDA64 itself.



I have actually been experiencing this on Windows 10 stable as well... and I would argue one can't call Windows 11 (22000) beta anymore. The RTM final code is available and running on most W11-equipped PCs right now. By all intents and purposes, what you see is what you will get on production systems shipping with the OS beginning tomorrow.

You can open up the link in MDL forum, there are some game benchmarks as well.

Most bizarre thing is that if you do a virtual OS, the guest OS doesn't exhibit this bug anymore. It is more complicated than it seems and purely is windows kernel related. Blame Wintel if you wish too.

AFAIK no RTM is sent, is just an another RC.
 

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I thought the discrepancy with Aida and L3 was because of win 11? Because my results look similar on the L3, but if I run 10 it’s normal.
 
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In our testing with pre-release builds of Windows 11, a feature called Virtualization-based Security (VBS) causes performance to drop. VBS is enabled by default after a clean install of Windows 11, but not when upgrading from Windows 10. This means the same system can get different benchmark scores depending on how Windows 11 was installed and whether VBS is enabled or not. We plan to add VBS detection to our benchmarks in a future update to help you compare scores fairly.


Maybe this has to do with your issue?

 
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You can open up the link in MDL forum, there are some game benchmarks as well.

Most bizarre thing is that if you do a virtual OS, the guest OS doesn't exhibit this bug anymore. It is more complicated than it seems and purely is windows kernel related. Blame Wintel if you wish too.

AFAIK no RTM is sent, is just an another RC.

Wow, that's news to me. If the VM is okay but the host OS isn't, then that's a pretty bizarre bug, my understanding was always that a VM's machine couldn't "exceed" what the host OS can technically do, the more you know... and yea build 22000 is pretty much it, the last few update packs have replaced most of the leftover bits that they were meant to change, and since launch is tomorrow, we might get another experience pack update on patch tuesday tomorrow but I would say that's about it, with as much confidence as I can. Cheers :toast:
 

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Is the 5800X at completely stock settings?

A.84 (experimental 1203c) is still a beta BIOS isn't it? I'm still on A.30 on my Unify-X for that reason (stable 1203b). Might want to try A.70 with 1203b.

I'm not sure if you remember but I think I mentioned the problems with my old 2x16GB CJR kit to you once. Inexplicable stuttering that I threw the entire laundry list at for almost 2 years, only to fix it by switching to B-die. Not sure if it's of relevance here. I was also running a 3600 16-19-19 profile, but your latency seems a bit high at the same settings. I was about 59.9ns with a 5900X's 2CCD penalty? Subtimings shouldn't account for a 2-4ns difference, maybe 1ns tops on CJR.

CB shouldn't be affected, you'd be hard pressed to find a noticeable difference in R23 even dropping to JEDEC speed. It doesn't really care about memory.

edit: just saw you're on Win 11. 1203c is supposed to be designed for Win 11 support, but who knows if MS or AMD or MSI have borked something.



iirc the L3 Aida "fix" around that time mainly for APUs that displayed ~1/2 L3 read speed? I would be stuck at like 300-400GB/s read while write and copy were normal at 600GB/s. As for the L3 here, it just looks like a bad BIOS for all the bandwidth to be that low. And I don't think the fix had to do with L3 latency, his L3 latency is worse than terrible.
Hey can you tell me more about what typenof symptoms you were experiencing when you had that Hynix DJR memory in with tour 5900x? I just sent back my 5900x. I was having cache problems. Particularly L2 and L3. So anything you can tell me would be appreciated.

*For others trying to fix this problem, i found adjusting voltage for CCD, IOD, and CLDO could negate the problems. Also even V core has an effect on L3 and L1 cache throughout.
 

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AIDA is bugged under Windows 11
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Hi,
Just the high latency on amd shows some feilds and maybe the entire aida64 suite shouldn't be taken seriously lol
 
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Hi,
Just the high latency on amd shows some feilds and maybe the entire aida64 suite shouldn't be taken seriously lol
This only happens on Dev builds, RTM releases are fine. I know, I tested this before.
 
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This only happens on Dev builds, RTM releases are fine. I know, I tested this before.
Hi,
So amd latency isn't above 50 ? love to see it lower if so otherwise yeah aida64 is full of it
Probably one of the worst stability test too.
 
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i don't know how long you guys are following MSIs Bios distribution for AMD but EVERY SINGLE LATEST BIOS will be called "Beta" until the next one arrives.
then it gets its beta tag removed. (like the previous one which was beta until A84 released.)

my PC takes ages to boot, shutdown and some games are barely playable.

i tested my 10900k today and this issue does not exist. (on the same OS and SSD without any changes)

AGESA is one thing. Vendor implementation is another. I've seen BIOSes being severely botched by a specific vendor (Gigabyte and MSI) on multiple occasions, where the same AGESA revision in a different board works just fine, because the other vendor didn't fuck it up. Latest instance was Gigabyte's handling of 1203b on my ITX board.

My point was that release BIOSes are less likely to have outstanding bugs. But I guess the L3 bench results is just a zen3 x win11 thing.

Perhaps the stuttering is actually a separate issue, hence my concern about the memory and slightly high dram latency for your setup. Copy is also on the low side for 3600 16-19-19, on the CJR kit I've never had copy below 51GB/s on 3700X and 5900X.

AIDA can be an awful gauge of actual memory performance, but it's easy to run something else like membench or LinX. R/W and latency in membench shouldn't be far off.

Question hasn't changed. Have you tried the current stable BIOS or not?

5900x 3600 full 59.2.png

Hey can you tell me more about what typenof symptoms you were experiencing when you had that Hynix DJR memory in with tour 5900x? I just sent back my 5900x. I was having cache problems. Particularly L2 and L3. So anything you can tell me would be appreciated.

*For others trying to fix this problem, i found adjusting voltage for CCD, IOD, and CLDO could negate the problems. Also even V core has an effect on L3 and L1 cache throughout.

CJR not DJR, although they are fundamentally similar and I have no exp with DJR. It wasn't to do with cache, it was memory-related, but the stuttering symptoms are similar that's why I mentioned it. I don't want to hijack gerkng's thread, so I'll just link my explanation in my thread:

 
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