sorry for opening an old thread but I recently got an SAPPHIRE HD 6850 vapor-x card to replace my old 7600gt. My motherboard is asus P5N-E SLI ...and I'm getting the black screen at start up ...it doesn't boot at all. Flashing to the latest bios doesn't help either.
I have a Silverstone ST50F-ES PSU (500W) - is the problem in the PSU or the MBO??