vCore questions

[amdwilliam1985]

Hello, I have worked with 2.4ghz with 1.4v for the past half year. Just recently I upped my vCore from 1.4 to 1.45 to get my self to 2.5ghz. The question I have is that, I set vCore to 1.45 in bios, but in speedfan, cpuz, and some other softwares, the vCore reads only 1.42 or 1.425. what the heck is going on here?

 

[sithscout80]

Is your CPU under load when you check it?
My voltage on my P4 runs at 1.52V (stock voltage) but drops down to 1.44V when I am running full load.

 

[kwalker]

its normal to see slight fluctuations in the windows envirnment with devices loaded and tasks running in the background.
depending on the voltage regulator circuitry of your motherboard the variation is differnt form one motherboard to another.
be more concerned with temps

 

[Sylanix]

I also have the same problem.
CPU-Z always indicated 1.425V instead of 1.45V. Just add 0,025V to the value its indicating. And then you have the real Vcore.
Altough the program EasyTune5 of my Gigabyte Motherboard shows the correct Vcore. I have an Gigabyte K8N Pro-SLI.
I recommend you to download/install a monitor tool from the producer of your motherboard. Then you're 100% shure its showing the correct Vcore.

Screenie:



(Do not watch the high Vcore for this speed. Just doing lil bit burn-in. I'll try to lower the Vcore to 1.425V next week!)

 

[chuckshissle]

Cpu-Z does that I have a Gigabyte GA-8N SLI Royal mobo and with my vcore set at 1.25v the EasyTune 5 is showing exact the same vcore voltage but the Cpu-Z is giving a 1.20v reading on vcore. I don't know why, must be a bug or some sort of glitch in the program.

 

[Sylanix]

Hmmz .. you're having a larger deviation.
I guess CPU-Z isn't able to read the data from the sensors correctly.

I repeat: Download/install a monitor tool provided by your motherbord producer!

 

[fainis]

is the cool`n quiet enabled? ....
if so .. cpu-z will read a different voltage unless your cpu is in full load
disable that option......or disable the driver (uninstall it)

a similar problem appears with intel cpus too...in here there are EIST, C1E, TM and TM2 technologies.....C1E and termal monitors are hardware..non os related ...and EIST is os related (works under win xp)...
for example a 1,375 Vdd cpu is recognized by cpu-z as a 1,2 or less ....if those (EIST,...) are enabled....


good luck.......