Hello all, This is more of an educational question rather then an issue. I have 2 cards in my mac pro. The first being a Nvidia GT 120 and the second being an Nvidia GTX 280. I booted the machine and it is able to run fine. However, when I go into the "About this Mac", it only recognizes the Nvidia GT 120. I was wondering, why is this the case? Am I able to switch it to display the "Nvidia GTX 280"? So far, I am assuming that the Mac is reading the GT 120 as the primary card. Is there any way that I can have Mac recognize the GTX 280 as the primary card?