Prime only works on one core... ?

T

TheGamerZ

Supreme [H]ardness
Joined
Sep 18, 2003
Messages
5,216
Whenever I try to prime both cores of my Opteron 170, only one core will be stressed. I've gone through and set affinities, etc etc and still.. only the core that I start to prime first gets stressed. The 2nd program looks like its working, but the core will show no usage.

Same with SP2004.


What's goin on?
 
I can't say for SP2004, but for prime, make sure you are doing the Small FFT test or the large fft test. If you do the Blend, which ever prime gets started first will use up most of your system memory and the other prime will not be able to do what it needs to do.

Bill
 
You're probably not running it correctly.

Start 2 Prime95 windows.

Set different core affinity for both in the task manager.

Go to Options -> Torture Test

Select "Custom".

In the text field labeled "Memory to use in (MB)", enter 45% of your total memory. So if you have 2 gigs of memory, enter 900 into the text field. Leave the other fields alone and hit "OK".

Repeat with the other Prime window.

Watch the task manager and after a while, both cores should be maxed.
 
It wont let me open up two separate windows; it acts like I should "just" be using the one that is already open.
 
You have to have the same files in two different folders for it to work correctly
 
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