Right ho, I've a rather tastey system with a lovely watercooled 4870 in it. All games run fine. But I'd like the Physx enhancements. Now would the stand alone physx card do it, or would my system be fine sticking in say a 9600 to act as a standalone physx card, and would my pc have a heart attack mixing nVidia and ATI? Advise on this would be much appreciated.