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Prime95: different test = different CPU temp?

post #1 of 7
Thread Starter 
I've noticed that the Small FFT test was 10 degree Celcius higher than the other two tests (In-place large FFT and Blend). I've tested with 1.5 vCore (68C vs 58C) and 1.388 vCore (62C vs 52C) to confirm. Now I've read some write ups on prime95, and they reported very little to no differences in temp for the three tests mentioned.

I believe most people accept the 'blend' test as gold standard for stability testing, but I'm just OC'ing my CPU right now and want to leave out RAM as much as possible until I get new sticks to play with.

Anyways, is the 10 C temp difference normal for C2Q?
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post #2 of 7
the small fft is extremely taxing on your cpu, I dont know what the normal difference is but it should be a good amount higher. And yes, blend for 24 hours is usually considered stable.
    
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post #3 of 7
Small FFT is simply designed to generate max heat and stress on the CPU, blend is a mix of small FFT and large FFT, it alternates both over time so the CPU never gets time to heat up as much as it will with small FFT. Also those with better cooling see the temp difference easier, I get 4c less with gromacs core in orthos compared to small FFT, while before I de-lidded my CPU I saw no difference.
     
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post #4 of 7
Thread Starter 
Thanks for the info,

So, would there be an instance where one would push the CPU to the limit (as in small FFT test) during normal computing/gaming?

I guess what I'm trying to ask is: If I don't want to go over the max temp my CPU can handle (71 C for Q6600 G0 in this case), what would be the best/easiest way to monitor that? (blend test? small FFT? orthos? none of the above?)
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post #5 of 7
As of I know there is no game or application out there will give the same temps as a small FFT test would, it is usually 5-10c less. If you want to give you CPU max load to see max temp run small FFT in any stress test program, most use Orthos or Prime95.
     
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post #6 of 7
Thread Starter 
So would you say temperature readings from 'blend test' is considered safe for everyday use even if temp readings for 'small FFT' is higher than recommended maximum value?

Thanks again man.
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post #7 of 7
Thats not really not answerable concidering we don't know what your average daily use consists of. If your a gamer, and you play FPS for hours on end, I would say NO it's probably not accurate, and you should really try to get a stable blend test. If however you do small ammounts of gaming with internet browsing and activities that wont stress your core for that long, sure it's going to be a fine test for you.
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