Core i7/X58 Overclocking Thread

[roller11]

It's a differential voltage problem. If you start getting away from a .5v diff between the QPI/DRAM (Vtt) and the DRAM voltage it could cause damage.

Is there a problem with running more voltage on Vtt than Vcore? I'm asking because I'm running only 1.184 volts Vcore cause that's all I need to achieve 4011Mhz CPU clock. I have Vtt set to 1.215 which is getting close to the .5 differential WRT my 1.66V setting on my Vram.

[SteveRo]

Is there a problem with running more voltage on Vtt than Vcore? I'm asking because I'm running only 1.184 volts Vcore cause that's all I need to achieve 4011Mhz CPU clock. I have Vtt set to 1.215 which is getting close to the .5 differential WRT my 1.66V setting on my Vram.

someone double check me but I think the .5v delta is between qpi v and ram v, correct?

[Lukee]

someone double check me but I think the .5v delta is between qpi v and ram v, correct?

That is correct.

[roller11]

That is correct.

I understand that the .5 diff is between Vtt and RAM voltage. My concern is whether or not Vtt should be equal to or less than Vcore. If so, then Vcore would be indirectly affected by the .5 diff.

[SteveRo]

I understand that the .5 diff is between Vtt and RAM voltage. My concern is whether or not Vtt should be equal to or less than Vcore. If so, then Vcore would be indirectly affected by the .5 diff.

I have never heard that vcore needs to be set to anything vs qpi - intel max v that I know of -