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CPU stability question

post #1 of 15
Thread Starter 
So lately i've been trying to push my e8400 to 4ghz.. ive gotten my orthos running for a bout 2 hours now and no errors.. however when i run IBT i get an error after 5 passes.. is IBT a better program to look for stability or is orthos pretty good? could heat be causing IBT be error out sooner? cuz orthos hasnt reached the temps that ive gotten on IBT yet.. i know that i should keep under 70c and with my processor running IBT it does hit 70.. but orthos its around 62.. if anyone has any advice i would appreciate it thanks..
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post #2 of 15
Quote:
Originally Posted by Kunkka View Post
So lately i've been trying to push my e8400 to 4ghz.. ive gotten my orthos running for a bout 2 hours now and no errors.. however when i run IBT i get an error after 5 passes.. is IBT a better program to look for stability or is orthos pretty good? could heat be causing IBT be error out sooner? cuz orthos hasnt reached the temps that ive gotten on IBT yet.. i know that i should keep under 70c and with my processor running IBT it does hit 70.. but orthos its around 62.. if anyone has any advice i would appreciate it thanks..
The reason for trying to stay out of the 70s and above is to avoid instability caused by heat. However, I think 70°C is not enough to cause instability.

As for IBT vs. Orthos: one isn't superior to the other. Instead, they're just different from each other.

Although, are you still using the stock cooling that came with the E8400?

Finally: which 500W Cooler Master power supply do you have? The PSU can be the culprit too.
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post #3 of 15
Thread Starter 
i dont have the stock cooling.. its a heatsink i got a while ago from another computer so its proably not the best.. i found it here on newegg http://www.newegg.com/Product/Produc...82E16835101009
the power supply was also from another computer and its kinda old so i wouldn't be surpised if it was that.. i did manage to find it on newegg and its actually a 550w
http://www.newegg.com/Product/Produc...82E16817171016
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post #4 of 15
Thread Starter 
How would i go about finding out if my PSU is causing me to get errors on IBT?
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post #5 of 15
imo IBT stresses a cpu more than orthos or prime. (hence the higher temps)
but in everyday use, are you getting any bsod's or is the pc turning off while gaming?
if not then i wouldn't really worry.

IBT will fail a test if the temps get too high as well.

also a good program to test the psu is OCCT http://www.overclock.net/downloads/191765-occt.html
just run the linpack test for 1hr, this will stress the cpu (its similar to IBT)
but in the results, it will show you results on the power rails on your psu.
this is a good way to check your psu
or just do the power supply test,
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post #6 of 15
The problem with IBT is that it drops V-core even lower VS Prime95 or Orthos, due to more stress from IBT. That is probably the reason IBT is failing. You need more V-core to compensate for the load. IBT is totally overkill and really not a must, in my opinion.

Prime95 small fft's, large fft's and Blend are more important for general stability. IBT mostly test only the CPU, and in an overkill way. Even Prime95 small FFT's run 10c higher than any game or program.
    
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post #7 of 15
Thread Starter 
great thanks guys.. i got occt and i run a few tests on there as well. i have been running this 4ghz for about a day now and i dont have any crashes or blue screens so i think it should be okay.. btw i got one more question.. and i know this has been beat to hell but i am seeing so many diffrent answers.. but here it is anways.. do you think ill be okay running 1.41 vcore for 24/7 use.. ive seen people say its good up to 1.45 and others say not to go over 1.36 so i dont know where i should draw the line.
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post #8 of 15
IBT is only one tool in the chest and it does get finicky with high temps.

If you would like to stress your CPU in similar, yet gentler way, you could try OCCT (as suggested above) and/ or LinX.

Prime95 is still the gold standard for stability.

Both will find errors if they are lurking.

Id also suggest if your PSU was the problem, you would have noticed it by now in heavy gaming or processor intense applications.

With respect to checking your PSU volts via software... dont rely on it, its never accurate. If you are concerned about your PSU volts, get yourself a digital multimeter and test the PSU directly.
Quote:
do you think ill be okay running 1.41 vcore for 24/7 use
1.41v in BIOS should be okay... 1.41v as Vcore... your call - its your chip but it is not recommended for 24/7.
Edited by Sethy666 - 3/21/11 at 4:21pm
post #9 of 15
Thread Starter 
i need 1.45 vcore in bios to read 1.41 in cpuz.. but when i go into the bios i have a hardware monitor and thats reading 1.40 vcore
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post #10 of 15
Quote:
Originally Posted by Kunkka View Post
i need 1.45 vcore in bios to read 1.41 in cpuz.. but when i go into the bios i have a hardware monitor and thats reading 1.40 vcore
I guess the question you have to ask yourself is, will the benefits of overvolting the CPU negate the risks of frying it?

Going above 1.4v 24/7 will damage your CPU in the long term. If you can live with that... fire away
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