Asus P5Q deluxe vCore

[megatron]

By sgtsixpack at 2010-01-19

Has anyone got big differences in bios set voltage and reported voltage? In the bios hardware monitor it show the vCore being set a lot less than I selected and then with load line calibration off there is a 0.07v difference between selected and set volts.

I set 1.3825v bios for my q9550 and at in CPU-z it reports 1.35v idle and then load it goes to 1.30v.

It could work fine, at these volts until it starts rebooting spontaneously. I am trying to get 24/7 stable clocks.

I can't read the vCore with a multimeter since I don't know the measurement point, I know the points for other readings. With these 45nm chips they are not as tolerant to voltages as previous generations.

Which is correct, the bios setting or the reported voltage?

 

[Temi_D]

As far as i know that has always been the case. drops more when the cpu is at load

 

[Devrij]

I don't have that big a droop on mine with an e8400. I leave LLC on to combat that problem and usually have vcore no more than .05 lower than what I set it at even under load (as far as CPU-Z is telling me anyway).

 

[Devrij]

with load line calibration off there is a 0.07v difference between selected and set volts.

fixed, .7V would be huge, but .07 isn't too bad tbh, especially with LLC off

 

[megatron]

fixed, .7V would be huge, but .07 isn't too bad tbh, especially with LLC off

It is huge for a q9550, 1.3 is just about its 1.2875 VID and 1.38v is over max VID of the chip (the voltage that the chip will go to on auto).

 

[Devrij]

so if your idle volts are .05 -.07 below what you set them at in bios, then you're fine. and put LLC back on, as it will help with Vdroop

 

[megatron]

Vdroop is designed to happen by intel otherwise u get voltage spikes and overshoot which it states will damage your cpu in the data sheet.

http://www.anandtech.com/cpuchipsets/intel/showdoc.aspx?i=3184&p=6