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Need help with overclocking the 3770k.

post #1 of 4
Thread Starter 
I was able to hit 4.5GHz on the 3770k with 1.28v on manual mode. I don't want to have the processor getting 1.28v at idle speeds so I tried using offset. While Prime95 was running, HWINFO showed a VID of 1.31v. 1.31v-1.28v = 0.03v. I set the offset to 0.03v (positive), and when I ran Prime95 again, CPU-Z showed a maximum of 1.26v. I've tried running 4.5GHz with 1.26v in the past and it crashes while gaming. What should I try doing? Load Line Calibration is set to ultra high, by the way.
post #2 of 4
If you are getting 1.26V and you want 1.28V, then just add 0.02 volts to your offset. So if it is +0.03 now, change it to +0.05 instead.

Edit: And you did the initial math wrong; it should be Vcore desired (1.28) - Vid (1.31) = offset (-0.03). But it shows why you need to check and adjust if needed.
Edited by Forceman - 10/22/12 at 11:26pm
post #3 of 4
Thread Starter 
Quote:
Originally Posted by Forceman View Post

If you are getting 1.26V and you want 1.28V, then just add 0.02 volts to your offset. So if it is +0.03 now, change it to +0.05 instead.
Edit: And you did the initial math wrong; it should be Vcore desired (1.28) - Vid (1.31) = offset (-0.03). But it shows why you need to check and adjust if needed.
Few questions:
-Using 0.05 gives it 1.28v while running Prime95 but only up to 1.264v while running IntelBurnTest. Is this normal?
-Which would be better, 0.05 or -0.03?
-Is it normal for to be able to pass 10 rounds of IBT but crash while playing Borderlands 2?
-IntelBurnTest only used up to 1.264v. Should I consider this my "stable" voltage?
Edited by Iamazn - 10/22/12 at 11:36pm
post #4 of 4
Different loads can result in different voltages because of Vdroop, so if IBT is loading the processor more heavily it may cause the voltage to drop more (and IBT is more stressful than P95, depending on settings).

If +0.05 gives you the voltage you need, then that is the correct offset. Calculating it from the Vid is just a target, you need to see what is actually provided and then adjust from that. The Vid method is not always accurate the first time.

As for stability, that's up to you, but if it is crashing in the games I played then I'd keep working on the overclock some more. It may be the 1.28V is just barely stable, and bumping the offset another notch may help. You may need to kick the offset to 0.045V so that your IBT voltage ends up being 1.28V also (or you could turn up LLC another notch).
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