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Prime 95 vs LinX

post #1 of 7
Thread Starter 
I have been overclocking for a few years now and the real question is how stable is your PC?

Anyone can throw up some voltages/multipliers/base clocks etc but is your PC "STABLE"?

There are a few people around that are happy with an hour or so of Prime95 or a problem size of 10,000 to 15,000 on linX and will happily declare their PC rock SOLID and boast their very low voltages.

But if you are like me and are only interested in much better stability regardless of the voltage and are paranoid about OC corruption, one hour of Prime95 will not suffice.

I found that my PC will do 10 hours of Prime95 blend without issue but once I used LinX 0.6.2 at 25,000 x 20 problem size, it failed on the first run.

I know that alot of peoples CPU coolers will not deal with the heat of LinX and they are unable to use it so prime95 or some such program will be the alternative.

Dont get me wrong Im not a advocate for LinX but I have found it through experience to be the toughest test I have seen so far and the best for finding system instabilities.

I have had only 2 i7's and have found the following:

i7 920 D0 4.2 GHz HT off = 1.384Vcore
i7 950 D0 4.2 GHz HT off = 1.376Vcore

The above were/are LinX 0.6.2 50 runs at 25,000 problem size stable.

Max Temps are between 83C and 76C with H50-1 with 2 fans push/pull.
DustFilter
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post #2 of 7
Linpack = CPU stability.
Prime95 = CPU (lite) / RAM / Chipset stability.
Bye Bye 775
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Bye Bye 775
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post #3 of 7
My own personal test...

-Prime95...'Small FFTs' for 10 hours
-Prime95...'Blend' for 10 hours
-LinX...using the most memory that's free (problem size ~20k) for 20 runs
-Watch for anything melted in your case

Finally some real world testing...

-Keep an eye out for random computer glitches
-BSOD from applications
-Video driver problems without an overclocked GPU
-Pretty much anything out of the ordinary

If you went through the stability testers but run into random glitches then I'd up the voltage and see if those glitches continue to occur. You're golden if you don't have them...otherwise you'd better double check your stability testers.
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post #4 of 7
Blend is generally less CPU intensive and can be seen as a better whole system tester than it is of your CPU.

I generally like to run:

8 hours of Small FFT
8 hours of Blend
8 hours of Memtest86
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post #5 of 7
I have stopped using LinX/IBT. Find it totally unrealistic and is mostly good for heating up CPU to insane levels, not detect errors.

I use Prime95 small FFT's, Large FFT's, Blend, Memtest for Windows and Memtest 86 for DOS.

Only reason why LinX/IBT is failing before Prime95 is because LinX/IBT is dropping the V-core further than Prime95. Otherwise LinX/IBT is just crap for stability testing.

I will not use it in my systems anymore.
    
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post #6 of 7
Yeah Linx/IBT fail,cannot tell you what's the problem with your OC..

P95 all the way,12hrs of each P95 test (Small FFT,Large FFT and Blend)..

Memtest for memory stability and you're done..

CHEERS..
     
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post #7 of 7
Yeah, Prime95 still rocks, as it has been doing for many, many years. If Blend stable 6 - 12 hours it is a very strong indication you have a solid system.
    
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