I have the Antec Phantom 500W psu. It has 2x +12v rails, one is at 18A the other at 17A. Now I am in the process of overclocking my Q6600. It's stable right now at 3.6Ghz. But when I load windows and I check the voltage on the +12v rail, I get a reading of about 3.46v. I get the same reading from : MBProbe, SisoftSandra and Speedfan. This also occurs when i have the processor at STOCK voltage and speed (1.3v & 2.44Ghz) But when I measure the +12v rail with my multimeter I get a reading of 12.04v. Now the strange thing is when I start loading the cores running Prime95 , the apps above start reading a higher voltage on the +12v rail, eventually reading very close to 12v when all 4 cores are running at max. Is my PSU's +12v rail busted or I need one with a better +12v rail?