You may want to consider using the 550Ti as a dedicated PhysX card as well. Go into the NVIDIA Control Panel, hop into the "Configure SLI, Surround, PhysX" section, and set it in there. I don't believe you'll be able to use it as a display card, but running both displays off of one card won't slow things down much at all (I'm driving three displays off of my iMac's 680MX--a mobile GPU--and it can easily run several games at 1440p 60fps without a hitch). I'm guessing that the 760 doesn't have a VGA port, but even modern cards generally ship with at least one DVI-I port (which is a DVI port that can carry both analog and digital output). If you don't have an adapter or they didn't ship one in the box, I'm sure I have an extra one that I can send you.