I just built a new rig with the following parts:
asus maximus iv extreme motherboard
nvidia geforce gtx 560 ti graphics card
4x 4gb DDR3 RAM
(need any other parts?)
And I booted it, installed windows 7, but when i try even the simplest of tasks, like opening a web browser or game, the graphics card shuts off and the whole computer resets about 10-15 seconds later. Sometimes it works, sometimes it doesnt, and when I've tried to download drivers for it, my computer just restarts and I have to try again.. Thanks for your help!