Rebooting when clocked to 3.4

[GTCole]

Hi guys

Just a quickie

I have a Prescott 3.0ghz @ 3.3, no problems with temps and system is stable, when i clock to 3.4 the sytem reboot randomly, the temps are all fine so i was guessing its my PSU not being powerfull enough at 320W, would i be correct or is it possibly something else causing my problem?

TIA

G

 

[GTCole]

It boots into windows and allows me to use the sytem for around 5 - 10 mins then reboots

 

[GTCole]

Eh?? as i mentioned the temps are fine, my cpu idles at 41C maxes at 65C and after clocking it to 3.4 does not go over 47C when i'm using applications