I was experiencing the same issue on a 780 when using a VGA cable, out of range occurred.
I also tried it with the DisplayPort output adapted to either DVI or HDMI input on multiple monitors, and would still get a black screen, though no out of range message displayed on monitor.
VGA and DisplayPort are the only graphical outputs on this 780 and to my knowledge it does not have a graphics card, only onboard graphics.