I am struggling getting two nVidia cards to work on my machine. I am running 10.8.3 with one 670 FTW and now want to install a 750 ti so that I can get more cuda cores for Adobe software and offload the monitors from my 670. I am able to get to the apple loading screen but then it freezes. It is as if it doesn't know what to do with the two cards. I also have updated to the latest Chimera but what am I missing? Any help will be greatly apprecited!