Vcore automatically raising itself?

Gixer

Gixer

Gixer

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I've been trying to lower my Vcore voltage to help keep temps as low as possible on my overclocked i7 930.

I've set it at 1.34375 in Bios yet when stress testing with Intel Burn according to CPU-z vcore raises itself to 1.396v. It raised itself to exactly the same voltage when bios was set to 1.35v.

I am using an Asus Rampage II mobo. Is there a setting I'm missing which means it wont change from what I set it to in Bios or is this normal for the above to happen?

Cheers
Paul
 
LLC (Load Line Calibration). Looks like you have this enabled. LLC adjusts Vcore to counteract voltage droop. I've noticed in the Rampage II that it over-corrects and actually raises Vcore under load.
Be aware that disabling it may cause it to go the other way and it may undervolt due to voltage droop.
 
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Thanks Stan, I'll take a look when I get home later. Still learning what all the settings do in Bios on this board.
 
Hey i have the same issue with a r2e. Setting the differential amplitude to 800 or 1000mv helped stop the vcore rising as much but only slightly. Also setting the diff amplitude to 1000mv made my clocks stable at 1 or 2 increments lower than with it set to auto.

Also do you have HT enabled ?
 
Stan_Lite said:
LLC (Load Line Calibration). Looks like you have this enabled. LLC adjusts Vcore to counteract voltage droop. I've noticed in the Rampage II that it over-corrects and actually raises Vcore under load.
Be aware that disabling it may cause it to go the other way and it may undervolt due to voltage droop.
Click to expand...

Would the Rampage 3 or the UD7 have the same problem ?
 
REIII and UD7 have something like that yes. But vdroop is not a big deal it is part of the CPU design and does a very real and valuable work. Unless you are benching hard core there is no real need to disable.

The techrepository has a really good article about it.
 
Sorry mate - Friday brain I think not working right :D

They both have a vDroop option in the bios.

I would not use the term better or worse to describe what is happening here. The bios is doing what it has been programmed to do. That is the function of those options in the bios settings.

I have a RE2 and Gigabyte UD9 (basically the UD7 with extra PCi-e slots) and the UD9 is very good with managing the vDroop. But I have not had any concerns with the RE2 in the past either.
 
I dont have HT enabled as I found it pushed my temps up to high when using intel burn. All my games are playing smoothly, including FSX with settings pretty much maxxed, so don't think its really worth the extra heat.

I'm just thinking along the lines that I've set it at 1.35v and its upping it to almost 1.4v which is higher than I'd like it to be going and will also cause more heat.

Wish I had a 930 D0 that required low Vcore to hit 4.2Ghz. Anything lower than 1.35v and intel burn causes a BSOD. I'm running 22/191 at the moment though to achieve 4.2Ghz. I'm going to try 21/200 over the weekend, maybe this will help with voltages? I'm also hoping changing to the 21/200 will mean I can set my DRAM at 1600Mhz instead of the 1532Mhz its currently at.
 
the ud7 has 2 settings for LLC, not sure what the RE3 has. anyway, on level 1 it will hold it at a steady value whether under load or idle, but level 2 increases under load.

i keep it on level 1
 
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