My cheap crappy PSU overheated and blew my rig.
i had one of these > http://www.scan.co.uk/products/700w-...an-atx-v23-psu
and after installing my new HD 6850 after 3 days of blissful gaming, while playing Borderlands. It turned off and computer is dead.
Now awating a new OCZ one from PC World and my concern now is that will my Rig still work with the new PSU. All the components look ok, just hope the PSU is fried.
So the moral of the story is don't buy a cheap PSU.