I have a 9700k (on a Gigabyte Z390 Gaming X motherboard with latest BIOS as of Feb 19, 2019) hitting 74c within 4 minutes of Prime 95 v29.4 Build 8 x64. I like to let it run with default values for 15 minutes to ensure it never breaks 85c. But it hits 95c soon after and I stop the test before the 15 minutes completes.
So, I read these posts and I grab Prime 95 v26.6 Build 3 x64 and, using default settings, it runs the full 15 minutes with a max CPU temp of 67c.
In my case, disabling AVX as instructed on Prime 95 v29.4 Build 8 x64 resulted in no difference. I was still unable to go the full 15 minutes.
Then I noticed something - the default test settings are different from version 26.6 to version 29.4.
26.6 Default Test Settings
Notice the shaded out area - Memory to use (in MB)=1600, and Time to run each FFT size (in minutes)=15
29.4 Build 8 Default Test Settings
Notice the shaded out area - Memory to use (in MB)=2000, and Time to run each FFT size (in minutes)=3
By choosing CUSTOM and reversing each version with the others default settings, the temps are adversely affected.
Turning off AVX made very little difference.
Turning off all options, Prime95 shuts itself down (latest version). Turning off all options except CPUsupportsSSE2=0 then allows the program to run without shutting itself down, but even still, no difference in temps. Only by changing the 29.4 default test settings to match 26.6 default test settings am I able to run the program for the full 15 minutes in a safe temperature zone (74c max in this case). Changing the 26.6 settings to 29.4 defaults result in much, much higher temps.
Can anyone explain why the default test settings were changed and why disabling AVX makes very little difference? (again, disabling AVX only on the latest version of Prime 95, just to be clear)
Thank you!
So, I read these posts and I grab Prime 95 v26.6 Build 3 x64 and, using default settings, it runs the full 15 minutes with a max CPU temp of 67c.
In my case, disabling AVX as instructed on Prime 95 v29.4 Build 8 x64 resulted in no difference. I was still unable to go the full 15 minutes.
Then I noticed something - the default test settings are different from version 26.6 to version 29.4.
26.6 Default Test Settings
Notice the shaded out area - Memory to use (in MB)=1600, and Time to run each FFT size (in minutes)=15
29.4 Build 8 Default Test Settings
Notice the shaded out area - Memory to use (in MB)=2000, and Time to run each FFT size (in minutes)=3
By choosing CUSTOM and reversing each version with the others default settings, the temps are adversely affected.
Turning off AVX made very little difference.
Turning off all options, Prime95 shuts itself down (latest version). Turning off all options except CPUsupportsSSE2=0 then allows the program to run without shutting itself down, but even still, no difference in temps. Only by changing the 29.4 default test settings to match 26.6 default test settings am I able to run the program for the full 15 minutes in a safe temperature zone (74c max in this case). Changing the 26.6 settings to 29.4 defaults result in much, much higher temps.
Can anyone explain why the default test settings were changed and why disabling AVX makes very little difference? (again, disabling AVX only on the latest version of Prime 95, just to be clear)
Thank you!
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