I'm running a GTX 680 for Windows gaming in my machine. The card is capable of 4 displays but in OS X due to Nvidia drivers or OS X itself it is limited to 2. More than 2 and it crashes on startup. With this in mind and the fact that I would still like a working boot screen I decided to keep one of my 5770's. I run both in my Mac Pro. How do I run my games in Windows using the GTX 680? Do I need to disable the 5770 via device manager or if the GTX 680 is the primary card will it be 'first choice'? Will the GTX 680 suffer if it runs along side the 5770 in windows? I appreciate any experience.