i built this computer myself.
the powersupply was a friends. and they said it was dead..
i like to repair electronics so i took it and replaced the bad capaciators inside it. and have been useing it sence..
this is a 500w psu.
the 12v rail is actually running at 12.75v and sometimes jumps up to 12.82. and that is as high as i have seen it..
im not sure if this is ok or not..
when i test the psu out of the computer case it reads closer to 12.4v
my 5v rail is at 5.19-5.22v
my 3v rail is at 3.43v
now my computer doesent run hot. and it seems pretty stable when i am playing a game..
i play painkiller and age3 for hours on end and dont have any problems...
but if i am useing internet explorer sometimes my computer freezes..
this also happens when i am playing starcraft online..
when playing farcry2 sometimes it will freeze for about 40seconds than i will suddenly be back at the desktop.
i am running win7 64.
my motherboard is a Asus M2N Sli Deluxe
AMD64 X2 5000+ @2.6Ghz
4x 1Gb DDR2-800
running 4 hardisks.
a power supply may not cause system freezes - it will cause reboots, or shut down in case of detected over voltages.
On this URL, way down on the page you will see a table that gives minimum and maximum tolerance values for the voltages. Your voltages seem fine as long as they are staying within the range and not overheating.