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post #1011 of 3792
Quote:
Originally Posted by cmdrdredd View Post

Because LLC will prevent vdroop. You can run negative offset and remain stable but if you get vdroop on top of it that might BSOD you.
Let me put it like this. Lets say your CPU runs 1.2v at load after droop. At 4.3Ghz you are stable here and you think "maybe I can lower vcore and keep the speed" and you try it and it BSODs. Then you add LLC and it keeps vdroop from happening so badly and what do you know, stable at lower than stock voltage.

Wait, so would your recommendation be to have LLC enabled or disabled?
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post #1012 of 3792
Quote:
Originally Posted by bigal1542 View Post

So since I am 4.3 GHz right now with an offset of -0.030 V with a LLC of 3, what would you recommend as an offset if I disable LLC?
Thanks

If you're stable now, then I say don't mess with it. I was just saying that if you had no LLC at all, your offset could be almost positive, so you wouldn't have to worry about idle instability (idle at too low of a vcore, so you crash at idle), because offset affects the voltage for every clock speed. This would cause your Vcore to be higher, but under load, you would have Vdroop down to your stable normal Vcore.

This would help if you were unstable at idle, but since you aren't, don't worry about it.
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post #1013 of 3792
Quote:
Originally Posted by bgineng View Post

If you're stable now, then I say don't mess with it. I was just saying that if you had no LLC at all, your offset could be almost positive, so you wouldn't have to worry about idle instability (idle at too low of a vcore, so you crash at idle), because offset affects the voltage for every clock speed. This would cause your Vcore to be higher, but under load, you would have Vdroop down to your stable normal Vcore.
This would help if you were unstable at idle, but since you aren't, don't worry about it.

Sounds good.

Is there any way to test for stability at idle or just to use it at idle and hope for the best?
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post #1014 of 3792
Quote:
Originally Posted by cmdrdredd View Post

Because LLC will prevent vdroop. You can run negative offset and remain stable but if you get vdroop on top of it that might BSOD you.
Let me put it like this. Lets say your CPU runs 1.2v at load after droop. At 4.3Ghz you are stable here and you think "maybe I can lower vcore and keep the speed" and you try it and it BSODs. Then you add LLC and it keeps vdroop from happening so badly and what do you know, stable at lower than stock voltage.
Actually, this is incorrect. With LLC enabled or disabled, you need a certain voltage to be stable at certain frequency.

Unless you're aiming for extreme overclocks (with LN2, for example) the "healthiest" (24/7) way to overclock is to set and Offset value while disabling Load Line Calibration.

Offset voltage is a value added to the base voltage of your CPU. If at stock you have 1.1V, and you set +0.2 to the offset voltage, you are stating that the maximum voltage is going to be 1.3

Load Line Calibration forces the voltage you set in the BIOS through the chip, and gets rid of Vdroop. Vdroop is a drop on voltage which follows Intel specifications to avoid damaging the CPU. WITHOUT LLC, when you set 1.35V on the BIOS, while you stress test the chip, voltage might drop to 1.3 - 1.25 V. When the test stops it will go back up. So Vdroop only is enabled while your CPU is under stress. This means you will have a larger voltage when idle than while doing work.
With LLC on, you can lower offset value. However, because of LLC enabled, you're actually providing more voltage at load.
With LLC off, you raise offset value. However, because of LLC disabled, you're providing less voltage at load.
Edited by PowerK - 6/6/12 at 8:38pm
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post #1015 of 3792
Quote:
Originally Posted by Piospi View Post

How many hours in the Prime95 need to believe that the processor is stable?
custom test + 90% ram

There are 82 FFT lengths in total if you're running Prime 27.7. Get through them all, so about 20.5hrs.

But true stability will be tested when you start using the processor for normal daily activity without any crashes. But getting through a full run of prime is a good test to start with. Also people are reporting WHEA event 19 errors when their processor isn't fully stable.
post #1016 of 3792
my Vcore idle voltage changes to 1.096v to 1.104 @ 1600MHz it is normal or it should be lower before OC it was like 0.97 or something like that?
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post #1017 of 3792
Quote:
Originally Posted by skyn3t View Post

my Vcore idle voltage changes to 1.096v to 1.104 @ 1600MHz it is normal or it should be lower before OC it was like 0.97 or something like that?

You can push much more OC with that CPU + Heatsink Combo. Easily 4.5+
post #1018 of 3792
Quote:
Originally Posted by PMantis24 View Post

There are 82 FFT lengths in total if you're running Prime 27.7. Get through them all, so about 20.5hrs.
But true stability will be tested when you start using the processor for normal daily activity without any crashes. But getting through a full run of prime is a good test to start with. Also people are reporting WHEA event 19 errors when their processor isn't fully stable.

Cant you just change each FFT from 15mins to 5mins and run the test for 7 hours??
post #1019 of 3792
you could, and its better than just running prime for 7hr for sure smile.gif the only problem is that some FFTS might not generate an error in 5 minutes, but it takes like 10 minutes for them to fail. then again you can never really guarantee stability as sometimes it might only give an error 30min into the hardest fft. its basically why i always test w 10-15 min fft and bump my volts a bit if it passes wink.gif
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post #1020 of 3792
Quote:
Originally Posted by Blatsz32 View Post

I have CoreTemp, HWmonitor, and RealTemp open right now and my lowest temp core 4 (core3 on CoreTemp) all say something different 12-15c. I have a custom loop. Also, my ambiant temps atm are pretty chilly. But still, i do find it facinating that al my other cores read 25-35 yet core 4 (3 on Coretemp) is so low.
It's even like that at load its the lowest temped core all the time..is that bad? Maybe it's not working correctly?
Well an 18 degree spread is the biggest I've seen. I see around 10-11 all the time on SB & IB whether air or w/c but 18 just looked, well, strange. wink.gif
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