Something that's bugged me since getting a nMP (8 core, maxed) at work a while back. I'm a video editor using two Apple Thunderbolt Displays and a TV for clients to view from a distance. Maybe someone can enlighten. OK, in system information, the D700 puts all connected displays on one of the GPUs. I have no concept for how OS X handles multiple graphics cards, I've always assumed it just can't. Is that extra D700 just chilling, literally doing nothing? I've seen no great mind blowing boost in Adobe's suite, nor should I. As I understand, Premiere only touches the second card on encoding/exporting. I'm always disappointed while watching stats to see almost no processes taxing the GPU, it's always abundant on CPU. Also, After Effects only reports one of the cards...So, my question: The D700 that's driving all of my displays, is that the card getting used as the primary card in all of these apps? Or is software or OS somehow able to delegate use of the other card while the other guy drives video output? I've searched high and low for support documentation to backup my understanding and have found none. Thanks! I'm running a 12c cMP MVC GTX 770 rig at home and to my eye, I'm performing the same or better in most scenarios.