Ok, thanks for the replies guys
My PSU is a 600w OcZ Stealth Xstream
and I did get into the game and played it for about 30 seconds and it just crashed on me and its messed up since then. But I can still hear that the fan is working.
So it looks like I'm gonna need a new card?
EDIT - Just fitted an old card into the PC and there's no defects on the screen, must be the other card then?