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Stable System not Stable anymore? - Prime95 Custom(Blend) caused Black Screen though no error to be found in the log. - Page 2

post #11 of 60
Thread Starter 
Okay been trying to get it stable, and it seems i can with Blend and Small FFT, but Large FFT caused BSOD after about 5 hours i think,
not really sure if it's the Vcore or something else though, any ideas?
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post #12 of 60
Try up IMC voltage a notch or 2 or relax your CAS to 9. Can't see your specs on mobile but it's not a good idea to overclock ram an CPU at the same time.
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post #13 of 60
Thread Starter 
Need to update, and totally missed your post, so will say where i am now.

I thought it was completely stable, as i had made Small FFT, Blend and Large FFT all at 12 hours possible, also a bit random OCCT and AIDA64 all tests activated except HDD run over night (probably 8 hours).

But some minutes ago i got a BSOD while watching youtube, and i was also encoding a video since a long time back, it has probalby ran for like 8 hours.

KMODE_EXCEPTION_NOT_HANDLED 0x0000001e

After searching i thought it was RAM, but i then found on this site that it's the Vcore that needs to go up.

The scary thing however is, all tests passed, and i still got BSOD.
How do i know if my system is stable now;S?


Also, i do NOT overclock RAM, i actually underclock it a bit, from 1600 to 15xx and the same settings, so i can't see why it would be unstable there.

Worth noting may be that i activated C1E etc after everything was table, as i thought it could save some power consumption.
Not sure if it has any impact on the Overclock though, i now you usually have it off during testing.

Edited by zerowalker - 5/10/14 at 1:36pm
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post #14 of 60
I've never seen that for too low Vcore (in basically the entire haswell overclocking guide with statistics thread + some others)

Triple check your RAM and drivers
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post #15 of 60
Thread Starter 
I don't have Haswell if that matters.

Also i did a Memtest86, and it passed for 14 hours until i shut it down, and that should most likely conclude they are safe.



Not sure what to do, was really hoping the test would fail so i could know where the error came from.
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post #16 of 60
Don't know why I didn't say anything before...

I'm guessing this is a case of voltage break-in. It's the first part of voltage degradation for a chip. There is a small window where chips can have a fast degradation until a certain point, where it slows down. I'm guessing your chip just went through this.
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post #17 of 60
Thread Starter 
I am sorry but that doesn't tell me anything;S

Are you saying my chip has degraded fast, but is now on the slow track or something?

If so, what should i do, will it stay so i can reproduce the errors?
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post #18 of 60
Basically, brand new a chip need X volt for Y speed. There is a break in period where it will need a minimal amount of volt to get an OC.
As time goes on, you will need more X to get Y. Early in it's life is a period where the amount of X will increase significantly faster than it will later. All you should need to do is increase volts a little, and you should be stable again. As time goes on, you may need to increase volts a little by little.
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post #19 of 60
Honestly i would put the whole system back to stock and stress test again to see if stays stable.

only then would i start overclocking each component until i find the one thats causing the issues. You might be experiencing electron migration. This happens when a component is overclocked and overvolted to the point where it begins to degrade the silicon and cause the chip to fail.

After testing each component to see what is actually functional then overclock again to see where it is.

a component thats failing due to electron migration will need more and more voltage to run at that clockspeed until it fails altogether.
post #20 of 60
Thread Starter 
Oh, then i understand, knew that, except the part of it going slower and faster, normally it's the other way around.

But the thing is, i have reset everything when i started the thread, and overclocked from the beginning, so i don't really compare it to my old overclock,
and i got it stable with pretty much all tests.

I got a crash on Prime95 Large FFT after 6 hours or something, so i upped the vcore one last time, then it passed 12 hours, then i ran AIDA64 just in case, and it passes overnight as well.

And that was, well perhaps 2 weeks ago, and now i got this crash, i can't really believe it's the age from that short amount of time.

And the thing is that i don't know hot to reproduce it, if i can do that, it's easy to solve, just try different things until the reproducing fails, something like that.

Thanks appreciate the help!
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