Voltage not behaving.

gcaster

gcaster

gcaster

Associate
Joined
18 Jan 2011
Posts
1,187
Location
South London
So, trying my first overclock now I've read a bit more after last weeks boot-fail.

Anyway running a Q6600 on a P5N32-E SLI and am stable at 2677MHz at the moment. One thing I've noticed is when I set the voltage manually in the BIOS (currently 1.3125V) it doesn't show this in CPU-Z or CoreTemp.

What CPU-Z and CT show when set to 3.125V are:

cpuzmj.jpg
57858891.jpg


coretempi.jpg


As you can see the CPU-Z voltage fluctuates between these 2 values but the CT stays at 1.275 which is stock for this CPU. There's quite a difference between the 2 and when loaded the CPU-Z value falls to around 1.200V.

Is this what's meant to happen? I'm confused. :confused:

Cheers
G
 
Anybody?
Vdrop of 0.05 (as in CT seems OK) but if CPU-Z is right then a Vdrop of 0.08 seems a little excessive does it not?
 
All my ASUS boards have under volted, so what you set is not always what you get. Then there's the in-accuracy of the voltage sensor that cpu-z is reading from.
The difference between the 2 readings you are getting is normal voltage fluctuation. Then if you put the cpu under load you'll find the voltage drops even more which is also normal.

The Reading in core temp is not the core voltage its the VID
 
They are not under volted deliberately, its just how all of mine have been. Ive tested with an accurate DMM and compared readings with what's set in the BIOS, which also differ from what cpu-z report.

Think about it, everything is built with a tolerance, so never going to be accurate.

Say your VRM outputs an accurate voltage but the voltage sensor is in accurate, or the other way round or both are way off at the opposite ends of the scale.
On board sensors, whether it be voltage or temperature are only there for a guide.
The only real way to measure the voltage properly is to get a good quality DMM or scope.
 
Mick-1965 said:
They are not under volted deliberately, its just how all of mine have been. Ive tested with an accurate DMM and compared readings with what's set in the BIOS, which also differ from what cpu-z report.

Think about it, everything is built with a tolerance, so never going to be accurate.

Say your VRM outputs an accurate voltage but the voltage sensor is in accurate, or the other way round or both are way off at the opposite ends of the scale.
On board sensors, whether it be voltage or temperature are only there for a guide.
The only real way to measure the voltage properly is to get a good quality DMM or scope.
Click to expand...

Agreed, cpuz always reports my volts wrong.
 
You must log in or register to reply here.
Back
Top Bottom