Recently finished a new build but having problems with my graphics card. It powers on, with all fans running and i get mobo beeps without the graphics card in. But if i add it and connect the auxillary power cables then all the fans twitch once and then stop completely; no further beeps, no fans, HDD activity or display. If the auxillary power cables are removed, then all the fans spin up and it beeps, but still no display. Any ideas guys?