I have two systems with dual gfx cards:
System 1: asus x79 deluxe (4930k), 1x gtx 770 4gb (in pcie slot 1), 1x gtx 780 6gb (in pcie slot 2), 10.9.4, clover bootloader, dual link DVI and single link DVI connections.
System 2: asus rampage iv gene (4820k), 2x gtx 780 6gb cards (in pcie slots...