topic Re:12900k and prime95 on linux in Mobile and Desktop Processors

12900k and prime95 on linux

smikkelsen — Sun, 21 Nov 2021 20:53:10 GMT

Update: Also happened on windows. Solved for now by reducing memory frequency to 3000 MHz. ASUS must still need to fine tune some settings on their motherboard.

I have a setup with

i9-12900K

ROG STRIX Z690-A GAMING WIFI D4

Bios: Voltage (SVID) set to "Intel failsafe". Max power draw set to 200watts

Memory: 64gb DDR4 3200MHZ

If I run prime95 (30.3b6) under Fedora 35 (linux - kernel 5.14.18-300.fc35.x86_64) I will quickly get:

[Worker #5 Nov 21 16:06] FATAL ERROR: Rounding was 0.5, expected less than 0.4
[Worker #5 Nov 21 16:06] Hardware failure detected, consult stress.txt file.
[Worker #5 Nov 21 16:06] Torture Test completed 1 tests in 5 minutes - 1 errors, 0 warnings.

As the test runs more and more of the worker threads will fail with this error.

It does not make any difference if i force the run on either performance or efficiency cores using taskset.

If I run prime95 under windows 11 I do not get any errors. So it seems limited to linux

Can anyone reproduce my findings?

Prime95 settings:

Your choice: 16

Number of torture test threads to run (16):
Choose a type of torture test to run.
1 = Smallest FFTs (tests L1/L2 caches, high power/heat/CPU stress).
2 = Small FFTs (tests L1/L2/L3 caches, maximum power/heat/CPU stress).
3 = Large FFTs (stresses memory controller and RAM).
4 = Blend (tests all of the above).
Blend is the default. NOTE: if you fail the blend test but pass the
smaller FFT tests then your problem is likely bad memory or bad memory
controller.
Type of torture test to run (4):
Customize settings (N): y
Min FFT size (in K) (4): 4096
Max FFT size (in K) (8192): 4096
Memory to use (in MB, 0 = in-place FFTs) (61073): 50000
Time to run each FFT size (in minutes) (3): 30
Run a weaker torture test (not recommended) (N): N

Re:12900k and prime95 on linux

JosueO_Intel — Mon, 22 Nov 2021 20:20:40 GMT

Hello smikkelsen,

Thank you for posting on the Intel communities.

In this case, we are unable to validate the results of tests performed by 3rd party tools. This is because we don't know how the tool measures the processor's features. We can only validate the results our tools provide.

In this case, we recommend you to download and run a stress test on our Intel® Extreme Tuning Utility, you can download it from the following link:

https://www.intel.com/content/www/us/en/download/17881/intel-extreme-tuning-utility-intel-xtu.html

Please run the stress test and share with us the results.

Regards,

Josue O.

Intel Customer Support Technician

Re: Re:12900k and prime95 on linux

smikkelsen — Mon, 22 Nov 2021 21:47:24 GMT

Hi Josue

Thank you for the quick reply. After I reduced my memory frequency from 3200 MHz to 3000 MHz in the BIOS the system has been able to run prime95 on Linux for 8 hours straight without issue. I suspect that ASUS has not fine tuned their BIOS yet.

Re:12900k and prime95 on linux

JosueO_Intel — Tue, 23 Nov 2021 17:21:25 GMT

Hello smikkelsen,

I am glad to hear that the issue is now solved and everything is working fine.

Remember that for BIOS concerns and assistance you need to contact ASUS directly to get specialized support on their products.

If you need any additional information, please submit a new question as this thread will no longer be monitored.

Regards,

Josue O.

Intel Customer Support Technician