I once again have limited connectivity as I blew up my computer. Was just reading a few websites when it just powered off never to see proper power again.

I disconnected everything, every power connector and unplugged it. I first plugged back in the large 20 pin connector on the motherboard and it powers on. I then plug in the 4 pin connector which supposedly powers just the cpu, and the machine won't power on any longer. Tried a different power supply and nothing. Had the same thing happen last time and replacing the MB fixed it - but why 2x now did the power portion /cpu section just die? Shitty motherboard?

It's an XFX Nforce 630i / 7150 MB with 2G of Ram, running an Intel socket 775 CPU (I think 2.8ghz). Another thought was the actual CPU, but swapping the MB last time with the same CPU resolved the issue, and this time the symptoms are EXACTLY the same.