Hi Everyone, I have a Mac 3,1 into which I just put in a gtx 660. It also has the x2600. When I boot up plugged in using the gtx 660 (there's no screen until I login), it shows the gtx660 card. When I boot up plugged into the x2600 I see the bootup and it shows the x2600 card. However, what if I have one monitor in one card and one monitor in the other? The mac still shows the x2600 but if I play a game which card will it use? Thanks!