I install it and nothing happens. Computer fans and card fans turn on, but no video signal. I put my old HD 6770 back in and it works. Tried updating bios, didn't help. Dell XPS 8300, 460 watt power supply. I also tried it in an older system I have that was running an NVidia 9800 GT. Same thing: just black screen, no boot up beeps, nothing. All fans (chassis and video card) start up and it just sits there.
Please help. I really don't want to have to return this card.