no because you would need an Nvidia gpu running graphics to use those features in the game. dont worry about because those two Nvidia specific settings dont really do much except lower the fps.thanks for the replies. Actually my 9800gx2 I always had to run in single gpu mode because otherwise it got too hot and i bsod'd.. i guess this was a common problem. I'll follow your guys advice and sell it for a single gpu solution.
also have a question regarding just cause 2. I read that this game uses CUDA. Would an nvidia / ati hybrid system take advantage of cuda?
PhysX hardware decoding in general is over hyped. Its just used for eye candy and unless you have a beefy SLI set up its going to kill FPS. Sometimes it does that in a noticeable way.
IMHO When your main card is an ATI (like mine) its now a waste to buy a Nvidia card for PhysX. I dont feel that I should have to jump through hoops to get PhysX running after Ive bought the capable branded hardware. Im not going to reward their bad behavior. I was going to buy a BFG GTX 260 for PhysX & Cuda then Nvidia did what they did.