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How to measure Vcore with a voltmeter?


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I am going to try and use this picture below in conjuction with my voltmeter to try and check whether my bios or CPUz is closer to the actual Vcore through my CPU. The picture doesnt make it very clear where to stick the 2 probes though, do I just pick one of each of the three Vcore and Vground spots at random? Cheers

 

Vcoremeaurement.jpg

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Yep black to Ground & red to any of the Vcore points.

 

I did this recently, initially i felt a bit unsure & so pushed the ground probe into a molex ground pin (black). This enabled me to focus on placing the red probe properly. This method may not be as accurate due to resistance. But i later repeated it using the ground & vcore as in the picture & got the same reading.

 

luck :)

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Vcore was spot on what you set it to in bios, the reading in bios was slightly understated whilst windows readings significantly understated the actual vcore. The really significant variation was Vdimm which read over the bios setting :-

2.6v = 2.66v

2.6v +.03 = 2.71v

2.7v =2.78v

2.7v +.03 = 2.81v

2.8v = 2.88v

2.8v +.03 = 2.91

 

cheers

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Right...I have taken the readings by the proper way (not the molex way) and they show that you CANNOT trust windows in the slightest. I set the Vcore at 1.525 in the bios. In windows it shows up as 1.52V, in the bios it shows as 1.54V, but the voltmeter reads 1.55V when idle and 1.57V when on full load. THat is a difference if up to .05V!

 

Now for the Vdimm. In the bios I set the Vdimm at 2.70V. In windows this value reads 2.7V, in bios it reads 2.74V but on the voltmeter it reads 2.77V at both idle and load. A difference of 0.07V!

 

This just proves how unreliable both the bios and windows are at reading voltages.

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Now you have to ask yourself.

 

Just how hard would it have been to put some easy to probe and labeled test points on these overclockers boards.

Little deal labeled "Test Point" for us thick fingered types that a probe would make contact with easily.

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