[Solved] BSOD's on boot, Gfx stopped working but has recovered

[Pudfark]

While, I have had Nvidia cards for the last ten years, I had a problem similar to yours about a year ago. The problem was finally traced down to my 4 month old PSU, it was defective. Of course, this was discovered after the replacement of MB, GFX card and memory. I would, if possible, try another PSU of known quality. Good Luck