I've searched the whole Web looking for the solution, but no one knows...
Maybe it is possible to connect two displays, one per each GPU? (And still have the same, large horizontal desktop) Yeah, I know, it sounds unbelievably
The problem will probably occur with using CUDA cores in CS6 - I want to install middle-end Fermi card (probably GTX 560-570), but all the displays will be still connected to the ati card.
The question is; Will Adobe applications discover, that I've got nVidia card on my motherboard, and will they use CUDA acceleration?
It works in a Mac, so I don't see why it won't work in a PC. You might need to move one of the displays to the nVidia card, but I'm not absolutely positive of that. My main display was my nVidia Quadro 4K, with the secondary being the ATI card that came OEM with the Mac. With the appropriate CUDA drivers installed on my Mac, PPro was able to see and use the nVidia card.
Should work fine in a PC...