Currently using a 12 core Mac Pro installed with 1 GTX 970. The card is the windows version and I don't want to flash the card because it's insanely expensive. I could, however, trade my Radeon 5770 for a GT 120. I need the Mac card so I can instal the proper drivers during updates, get the boot screen when I need to, etc. My issue however, is that the AMD card is too bulky to fit into my system as I only have one free PCIe slot and the card also requires one power cable I don't have. I can get my hands on a GT 120 for Mac, but I'm unknowing as to which card will be used during actual video editing and animation. Is there anything I have to do to make sure that the GTX 970 will be utilized? Any certain steps I have to follow? I will be mostly using Final Cut Pro X and Adobe After Effects CS6.