In my system currently I have a 7870, which i really love for gaming. However, my 3D rendering program Blender (using cycles) is not currently compatible with openCL, but CUDA is. So aside for building a completely new system that is nvidia based, could I just run both cards in the same system but independently of each other? Using the nvidia card solely for CUDA and the amd card for gaming? If that is not an option, could i just switch out the cards when I am doing rendering, or do I need a separate system? Thanks!