Prime95 Cores not running

[Mentos]

Hey, I´ve been doing some tests with prime95, I wanted to see how my tempered glass panel affects the temps and sound. I ran prime95 and noticed that core 6 shut down instantly and core 5 went right after. Maximum temps are always 68C and idle around 36C, any idea why this could be happening?

 

[Mentos]

Core 2 just stopped too...

 

[porina]

It means your system produced a computation error. What version and settings did you use for stress test? What FFT size did it fail on? If you don't have it on screen any more there is a result log text file too. System details?

[Mentos]

I used Small FFTs, GTX 1060, i5 8600k

"[Mon Dec 24 21:39:57 2018]
FATAL ERROR: Rounding was 0.4814172535, expected less than 0.4
Hardware failure detected, consult stress.txt file.
FATAL ERROR: Rounding was 0.5, expected less than 0.4
Hardware failure detected, consult stress.txt file.
FATAL ERROR: Rounding was 0.4999061299, expected less than 0.4
Hardware failure detected, consult stress.txt file.
[Mon Dec 24 21:45:07 2018]"

One core always failed at start, then about 5 seconds later another core went with it and a minute later a third one (The third one only "crashed" once)

[Mentos]

Might´ve been the OC actually, but I get higher stock temps than with overclocks on prime95, I only wanted to test how far my pure rock slim could go since I wanted to upgrade. Crashed at 4.4GHz with 1.145V, do I have to put the voltage up to fix the core crashes or what exactly?

[porina]

That voltage is way too low for those clocks and Prime95. There's different ways to look at it. Do you care about Prime95 stability, as it is a stress beyond what most people will ever encounter. You could increase voltage, but everything will get hotter. You could use AVX offset to lower clocks when AVX code like Prime95 is running.

 

BTW Small FFT fits inside the cores, so maximum stress on the CPU, not so much on the ram. If you had said you were doing large FFTs, it could also be ram related.

[Mentos]

Yeah, the voltage was working for every game, I guess not for prime95. It was mostly an undervolt/oc, good to know that my voltage was low tho. Thanks for the help!