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When do most prime95 errors occur

post #1 of 9
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I've been running prime95 blend using 2800MB of RAM for 2hr, Win7 idles around 1GB, I don't know what the max to use in p95 is.

But I'm not going to run it much longer for now.

When do most problems occur, for me they've almost always been in the 1st 10min, but I've hardly used it compared to some.
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post #2 of 9
Its random, I've had errors occur within the first 2 hours and then some have happened on the 16th hour. Errors occur when something is unstable in your overclock.
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post #3 of 9
Its all probability, so even a CPU at 50% stability could error either in the first half of your test or last half of the test at either extreme ends.
You can assume its more likely that a more unstable CPU will error earlier than a more stable CPU, but that can also not always be true, its just depends when the CPU makes the mistake, there is no certianty.
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post #4 of 9
Quote:
Originally Posted by Mit Namso View Post
I've been running prime95 blend using 2800MB of RAM for 2hr, Win7 idles around 1GB, I don't know what the max to use in p95 is.

But I'm not going to run it much longer for now.

When do most problems occur, for me they've almost always been in the 1st 10min, but I've hardly used it compared to some.
In the first 10 minutes is generally because of a low vcore, couple hours+ is usually because of QPI/VTT. It obviously depends on a lot of things, but more than 50% of the time this is true in my experience.
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post #5 of 9
I would estimate;

60% errors in first 10 mins,
80% errors in first 30 mins,
90% errors in first hour,
99.9% errors in first 8 hours.
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post #6 of 9
Quote:
Originally Posted by Airolden View Post
In the first 10 minutes is generally because of a low vcore, couple hours+ is usually because of QPI/VTT. It obviously depends on a lot of things, but more than 50% of the time this is true in my experience.
sorry for the ignorance, but what is QPI/VTT on the 1155 platform?

thanks
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post #7 of 9
If an OC is truly unstable, it will crash in the first minute. For fine tuning you want it running for around 10 hours. Try Intel Burn Test, it is much more demanding and will rape your system immediately if there is any sign of instability.
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post #8 of 9
I would recommend OCCT CPU test for 3 hours (although most people here recommend Prime95 or IBT). It does not show the max temps like IBT or Prime95 small fft, but it usually finds errors easier and faster.
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post #9 of 9
Quote:
Originally Posted by Chunkylad View Post
If an OC is truly unstable, it will crash in the first minute. For fine tuning you want it running for around 10 hours. Try Intel Burn Test, it is much more demanding and will rape your system immediately if there is any sign of instability.
IBT is terrible for 2500k/2600k processors.

I can pass 10+ runs at maximum IBT @ 4.8GHz, and fail p95 small ffts in the first 30 seconds.
    
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