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Bios voltage vs. CPU-Z voltage

post #1 of 4
Thread Starter 
I'm not necessarily doubting that cpu-z is incorrect, but when I set the vcore in my bios it doesn't seem to actually set it to that. My voltage in cpu-z shows up much lower and fluctuates well under what I've set it at.

Example: I set the vcore to 1.20v in bios for a 4ghz OC, when I go to stress test with prime95 it shows in cpu-z as 1.136v. Sometimes it even goes down to 1.128v for a few seconds then goes back to 1.136v.

Besides my cpu voltage and ram voltage, every other voltage is auto (vccio, pll voltage, etc). Cpu spread spectrum is enabled, c1e and speedstep are disabled so it's always at 4ghz even in idle.

I'm just wondering what settings in my bios are the reason for this or is this normal?
Edited by Piezo - 11/5/11 at 6:33pm
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post #2 of 4
Thats normal.

Vdrop: the difference between the set value in bios and what your CPU gets on idle.

Vdroop: the drifference between the idle and full load voltage figures

you will always loose some Vcore to the system so a figure under the bios setting when idle is normal

when you load your CPU the Vcore will again drop (again this is normal)

ie.
Bios 1.20v
Idle 1.17v
Load 1.10v
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post #3 of 4
Thread Starter 
Hmm, thank you. But is this big of a discrepency normal though? I thought it might fluctuate but not by this much. I have LLC at medium...
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post #4 of 4
Yeah some boards / chips can have quite large drop/droop
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