If you buy one of these new ATI's, eg 5850 or 5870, and you come form an old 8, 9 or newer series Geforce cards you can use the Old card in the second PCI-E slot for hardware Physx. You have to use Windows 7 for this. I did this and I can tell you it works like charm. On the first screenshot you see 3D Mark Vantage scores with my HD5850. On the second screenshot you see is with my new ATI and my old 8800GTS 640. As you see the cpu perfomance is more than twice as good. All you need to do is read this topic on ngohq forums very carefully. This is a great way to use your old hardware. Be aware your powersupply can handle this. I got it work in about 10 minutes and I can tell you my NVIDIA wil not leave my case now. I also tested stability in GTR EVO, had no issues at all. Ok guys, and girls, read it carefully and try it, I wonder what you think about it.