Stress Test Problems with Prime95

Toggle sidebar Toggle sidebar
P

pwills2009

Reputable
Aug 6, 2014
6
0
4,510
So I'm overclocking my cpu using Prime95. I have a i7-4790k with a corsair h100i liquid cooling unit. I have an asrock motherboard, and the BIOS lets me set overclock speed targets, so it's currently set to 4.5MHz, at about 1.28V. When I run Prime95, the temps stay pretty consistent for about 7-8 minutes, with a slow climb from about 65 degrees to about 77. Then it will shoot up to around 100, at which point i stop the test for fear of hardware damage. Is this normal for a stress test? My system didn't crash but I didn't want to fry my cpu by just stress testing
 
Solution
CompuTronix
The problem is twofold:

(1) You're running the default test "Blend", which is a cyclic workload for testing memory stability, and increases the processor workload at ~ 16 minutes, thus the increase in Core temperatures. You should instead be running Small FFT's, which is a steady-state 100% workload.

(2) The current version of Prime95 is 28.5, which runs AVX/FMA instructions on your processor's FPU. This code is for high-level number crunching and A/V content creation. Running AVX/FMA code requires significantly higher Vcore, which is why your Core temperatures skyrocket and / or you get a BSOD. You can see the same results by running AIDA64's FPU test.

You need to download and run Small FFT's on Prime95 Version 26.6 -...
Sort by date Sort by votes
CompuTronix

CompuTronix

Intel Master
Moderator
Nov 13, 2006
6,374
279
38,240
The problem is twofold:

(1) You're running the default test "Blend", which is a cyclic workload for testing memory stability, and increases the processor workload at ~ 16 minutes, thus the increase in Core temperatures. You should instead be running Small FFT's, which is a steady-state 100% workload.

(2) The current version of Prime95 is 28.5, which runs AVX/FMA instructions on your processor's FPU. This code is for high-level number crunching and A/V content creation. Running AVX/FMA code requires significantly higher Vcore, which is why your Core temperatures skyrocket and / or you get a BSOD. You can see the same results by running AIDA64's FPU test.

You need to download and run Small FFT's on Prime95 Version 26.6 - http://windows-downloads-center.blogspot.com/2011/04/prime95-266.html - Your Core temperatures will run 10 to 20C cooler.

Also, please give this Sticky a read: Intel Temperature Guide - http://www.tomshardware.com/forum/id-1800828/intel-temperature-guide.html

Thanks,

CT :sol:
 
Upvote 0 Downvote
Solution
You must log in or register to reply here.

TRENDING THREADS

Latest posts

Moderators online

Share this page

COMPANY
RESOURCES
FOLLOW
Top Bottom