Quote Originally Posted by clo007 View Post
It has been rock solid at 3.6ghz for 2 weeks since I got the new mobo in. Grounding is not an issue as I put electric tape underneath the mobo at the connection points. It does not even boot into bios now.
Have you tried booting with a *completely* minimal setup (no fd, dvd etc.)?

Could it be a faulty PSU?

You can short the green wire with a ground wire (ATX 24-pin plug) and fire up the PSU. Then you can measure the voltages on the 3.3, 5.0 and 12.0V rails and check if anything is out of the ordinary.