doa motherboard?

[MeatBridge]

I just built a new computer for my friend, it worked great for 2 weeks and now it keeps restarting, at first I thought it was heat related, but the cpu was only at about 45 C. I looked online and the someone who had the board said they upped the voltages to the NB and processor and that solved thier problem, so I am going to try that, but was wondering if this sounds like a motherboard issue or maybe psu??

Thanks

Specs
Intel 3.2 64 bit
Motherboard A-bit aa8 duramax
1 gig ocz ram
plextor dvd drive
gigabyte 6600 gt
kingwin 420 watt

 

[Cromewell]

Sounds like the PSU crapping out, you shouldn't need to up the voltage on anything unless you are overclocking

 

[Praetor]

Indeed .. keep an eye on voltage stability ... but if you want a jury-rig solution, upping the Vcore by a notch shouldnt hurt