12V Rail reading 8.184V?

[Stephie_Girl]

So I have a CM GX 650W PSU.  HWMonitor and OCCT read the 12V rail as 8.148V.  Now the Bios reads it at 12.03V, and I ran 2 HD 7950's in Xfire for a few months at one point.  I've also changed motherboards and it does this in both Win 7 and Win 8.  It's done this since I got it in 2011, strange huh?

[Ilumic]

Hmm think its on its last legs ;D oops dident see that its done it since you got it, its probably a program problem , true way of testing it would be to get a multimeter 

[Ghost]

Get a multimeter and measure the voltage that the 12V molex rail has, that's way out of spec, your computer would be off at 8V.

[LIGISTX]

Yea, at 8v things would not be working anymore. Everything would be fried from being undervolted. Im sure the BIOS reading it at 12.03 is the correct value, and for whatever reason your programs are reading that value incorrectly.

[BlackOutCrisis]

A cheap way of testing is to take it into your local hardware store and ask them to use their multimeter and that will tell for sure what the 12v is putting out, all you need to to take the psu in along with the power cable and turn it on and test it.

[quan289]

OCCT, HWMonitor, and even the BIOS aren't really reliable in voltage monitoring. Assuming that the software is monitoring the correct sensor (the very sensor the BIOS monitor), the sensor typically isn't accurately calibrated to give you any meaningful value. I've seen voltage drop down to <10v and even go up to 16v even in the BIOS. If the PSU is indeed outputting such a low voltage the 12v rail, then the UVP of the PSU would have trip off.

 

Also, lets say the sensor is accurate, the BIOS won't help much since your system isn't being stress when you are in it. If you want to have a more accurate value, it is best to used a DMM.