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Question about offset voltage

post #1 of 7
Thread Starter 
I just recently started using offset. I just have a few questions to see if I'm missing anything.

When I was set to MANUAL at load my vcore as 1.336v mostly but drifted to 1.344v. My VID at that time was 1.3861

Right now my offset is at -0.050 I think that's how its supposed to be since 1.336+0.050 ~ 1.386, first of all, is that correct?

I also noticed that my VID after doing Prime for a short 5 mins (Small FFTs) my VID went up to 1.3911 is that normal?

Also overall I noticed that my temps have actually gone up, during offset my vcore maxes at 1.328 and is normally at 1.320. How is this possible? It's lower than my manual voltage. Nevermind, I got my folding temps and prime temps mixed up haha.

I forget some of my overclock settings but I know theres a 350% and Ultra High (LLC?) which I believe had to do with this.

I appreciate any help or further improvements!

EDIT: Also C3/C6 is disabled
Edited by B-rock - 1/15/12 at 8:21pm
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post #2 of 7
The Vrise is because of the ultra high LLC, try dropping it down a bit. Your grasp of offset voltage is okay too.

For my core for example at auto it volts at 1.4v so i set my offset DVID to -0.100v to get it to 1.3v Vcore.
 
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post #3 of 7
Thread Starter 
So what happens when I drop down the ultra high LLC?
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post #4 of 7
Quote:
Originally Posted by B-rock View Post

So what happens when I drop down the ultra high LLC?

LLC stands for Load Line Calibration. As your mobo increases the voltage under load to power the CPU, heat increases due to the increased current. As a result resistance increases and therefore voltage drops. LLC increases voltage dynamically depending on the change in resistance under load. The aim of LLC is to eradicate Vdroop which is the term which describes how the increase in resistance causes a drop in voltage under load.

To answer your question, when you drop LLC, it won't push the voltage up so much when it counters resistance increase under load. Having an ultra high LLC can mean that it tries too hard to counter Vdroop and this gives you a Vrise.

You need to fiddle with LLC after your OC is stable in order to find a balance between Vdroop and Vrise.

Vrise and Vdroop are not a massive problem as long as the changes do not exceed maximum voltage or cause instability.
Edited by GerroffMe - 1/19/12 at 2:35pm
 
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post #5 of 7
Thread Starter 
Alright, I think I understand you. So my OC is stable 47x @ -0.050 12hr. Under load my vcore was between 1.326-1.338 I think it was (I'm not at my home computer) so adjusting that would decrease those differences.
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post #6 of 7
Quote:
Originally Posted by B-rock View Post

Alright, I think I understand you. So my OC is stable 47x @ -0.050 12hr. Under load my vcore was between 1.326-1.338 I think it was (I'm not at my home computer) so adjusting that would decrease those differences.

Yeah you got it, don't worry too much about LLC, it isn't the most important factor but it can be useful for fine tweaking and counteracting dramatic Vrise or Vdroop.
 
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post #7 of 7
Thread Starter 
Sounds good, thanks for the info +rep
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