AVX stress test failed overnight after 5 hours in XTU?

[SmartOne_2000]

Hi ...as the title says.

I'm under volting at -50mV (-0.05v) via the V/F curve offset option. My P-Core and E-Core configurations are 56x and 44x, respectively (13900K processor, 128GB DDR4 3600MHz ram).

1. Does the AVX failure after 5 hours mean my system is unstable? If so, how long should I run this       stress test before my system is considered stable, at least from an AVX/AVX2 perspective (and         hopefully without ruining my processor)?

2. Does the AVX2 offset option also work for AVX instructions?

[Steven_Intel]

Hello SmartOne_2000,

Thank you for posting on the Intel® communities.

I will do further research before providing an answer, however, please be aware of the following:

• CPU undervolting/overclocking is not supported.
• The processor memory specifications are Up to DDR4 3200 MT/s (https://www.intel.com/content/www/us/en/products/sku/230496/intel-core-i913900k-processor-36m-cache-up-to-5-80-ghz/specifications.html), and you are currently running DDR4 at 3600 Mhz, which is considered a type of overclocking. We recommend running memory modules under the processor specifications.

As soon as I have an update, I will let you know.

Best regards,

Steven G.

Intel Customer Support Technician.

[SmartOne_2000]

Any status on my case? In the Intel XTU tool, do AVX and AVX2 instructions use the same voltage offset? XTU specifically calls for AVX2 offset, implying there's a another separate voltage offset for AVX instructions. Is this true?

[SmartOne_2000]

1. You say, Overclocking/Undervolting are not supported yet you offer XTU, an overclocking tool lots of people use, right?

2. I run my 3600MHz ram just fine on my 12900K. The 13900K should have no problem. Asus motherboards are designed to work with DDR4 ram speeds beyond 4000MHz, Higher with DDR5.

[Steven_Intel]

Hello SmartOne_2000,

Thank you for your patience.

1. Does the AVX failure after 5 hours mean my system is unstable? If so, how long should I run this stress test before my system is considered stable, at least from an AVX/AVX2 perspective (and hopefully without ruining my processor)?

A.1: This processor supports the following sets of instructions: Intel® SSE4.1, Intel® SSE4.2, and Intel® AVX2. If the system is failing the AVX, it is because it is not supported.

2. Does the AVX2 offset option also work for AVX instructions?

A.2: The difference between advance vector extensions expansions is:

A processor that supports AVX2 is backward compatible with AVX, and a processor with AVX-512 is also backward compatible with AVX2 and AVX. A processor compatible with AVX is only able to manage AVX. Intel® AVX and AVX2 Technologies may not be available on all SKUs. Please check https://www.intel.com/content/www/us/en/support/articles/000005779/processors.html

We provide XTU for customers who are interested in tuning the processor, as well as overclocking guides to make this process more secure and easy for our customers. However, since we do not recommend it, as it could cause issues with the processor, Intel Customer Support does not provide support for it.

Best regards,

Steven G.

Intel Customer Support Technician.

[SmartOne_2000]

1. If you saw the first sentence in this post, it shows that I have the latest 13900K processor. It does support AVX, AVX2, and AVX512 (with E-cores disabled).

2. You did not answer my question, unfortunately. I did not ask for backward compatibility. I know they are AVX512 is backward compatible with AVX2, which is backward compatible with AVX.

I'll re-state my question ... Does the AVX2 offset also apply to AVX or not. Does the AVX2 offset also offset AVX instructions as well, since AVX2 is a heavier workload than AVX?

Different opinions out there in this issue. I'd hope you, the processor designers would easily know this question.

Thanks!

David

[Steven_Intel]

Many thanks for your response and for the clarification.

I will do further research about this, as soon as I have an update, I will let you know.

Best regards,

Steven G.

Intel Customer Support Technician.

[Steven_Intel · Accepted solution]

Hello SmartOne_2000,

AVX2 offset also apply to AVX, since a processor that supports AVX2 is backward compatible with AVX, and on the other hand a processor compatible with AVX is only able to manage AVX.

Let me know if further assistance is needed.

Best regards,

Steven G.

Intel Customer Support Technician.

[Steven_Intel]

We are glad to know the information helped. Hopefully, it will help other community members. Since the thread is now solved, we will close it. 

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

Best regards,

Steven G.

Intel Customer Support Technician.