How accurate is cpu-z?

Get out a multimeter.

Alternatively, Google load line calibration, vdrop, vdroop, and why you shouldn't set voltages in software, and get out a multimeter.
 
momo56 said:
I set the vcore to 1.30 volts in ai tweaker but cpu-z gives me 1.343.
Similarly 1.325 in the bios gives me 1.38 vcore.
Click to expand...

koooowweeee said:
how is that drooping upwards???
Click to expand...

that is an upwards increase in voltage. it's not vdroop, vdroop is when the cpu is loaded and the voltage falls due to the increase in current.

it's just poor voltage regulation of the motherboard.
 
twist3d0n3 said:
that is an upwards increase in voltage. it's not vdroop, vdroop is when the cpu is loaded and the voltage falls due to the increase in current.

it's just poor voltage regulation of the motherboard.
Click to expand...

Even for a rampage 2 extreme? I thought it was designed for overclocking :(
 
It's vdrop, not vdroop. Vdroop is a difference between load and idle voltages. There can be overshoots and undershoots depending on the board. Load Line Calibration is suppose to counter negative vdroop (and usually vdrop as well) but it brings overshoots under load. Vdrop is the difference between what you set in BIOS and what real voltage applied to the CPU is.

Software overclock tweaking is just a fail. Turn off the LLC and do BIOS tweaking only.

CPU-Z measures vcore fairly accurately, in my case it is .004V margin of error.
 
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