This is different than most of the other multiple-GPU questions I've seen. I am building a system that will be a gaming/rendering machine (Win7) and a programming/work machine (Ubuntu).
I've always preferred AMD/ATI cards for Linux due to the open-source drivers available, but I would like to take advantage of the CUDA cores for Adobe Elements, possibly building a small render farm in the future.
What I want to know is can I have 2 nVIDIA cards installed on the mobo, and have them active when I have booted into Windows, but upon booting into Ubuntu, have the AMD cards become active? Are there BIOS settings/other ways to accomplish this? I'm looking at using an EVGA SR-2 Classified mobo.
I realize that this might not be 'practical' from a cost standpoint, but I'm not really worried about that for this project.