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View Full Version : Setting affinity for Dual-Primes, necessary???


M Diddy
01-23-06, 11:15 PM
Just curious if it's necessary to set the affinity for each instance of Prime when running duals. I've noticed as long as I'm running two instances, both CPU's get pegged anyway. Is it important to set the affinity to each core?

RangerXLT8
01-23-06, 11:37 PM
Just curious if it's necessary to set the affinity for each instance of Prime when running duals. I've noticed as long as I'm running two instances, both CPU's get pegged anyway. Is it important to set the affinity to each core?

I never have even touched it, and both cores get loaded.

pscout
01-23-06, 11:38 PM
I am not sure. I don't usually even run dual prime ... just a single prime for the first 4k? test and half the second one during blended tortue test ...if it passes then i just dual fold with my network disabled so i don't turn bad results if something is not stable.

I don't often try to push my mem too far since if my temps go up due to ambients, my rig will usually just freeze and i don't like to lose production!

3DFlyer
01-24-06, 12:30 AM
Prime is a waste of time anymore. People have had machines pass prime and they won't record a score in PCMark04. The point of running Prime95 is to test for stability, but if it isn't stable after using it, it's no good. If it'll pass all benchmarks like PCMark04, 3DM'01, '03, '05, '06, and MemTest and will run games and intensive apps without errors or CTD's it's good to go. I've ran it one time, and it passed and it wasn't stable. Haven't used it since. My guess is it's just too old for these new CPU's anymore, and won't test them properly.

bikinistud
01-24-06, 12:40 AM
Well... personal experience has been to set affinity with dual cores and to only test the cpu (basically have two instances running the in-place large fft torture test) I must say that while some have had problems with it, i swear by it because if my machine can pass dual primes (one set to 0, the other to 1 under affinity) for more than 8 hours, it can pass all those other test (granted, i don't use prime for memory test because it simply does not do a good enough job with the "blend" torture test and i still use memtest for any memory testing)

So for your presler i would try that and see if it works

just my 2 cents

Albigger
01-24-06, 12:46 AM
I set affinity with prime one advantage is you can see what cpu is failing (consistently) at least in a dual-cpu computer that is the case. I imagine it would be the same with a dual core, although maybe less useful (for example if one of my cpus is worse than the other I can replace it, but you can't just replace one core on a cpu).