I picked up one of these http://www.amazon.com/Ageia-PhysX-1...F8&qid=1366657568&sr=1-1&keywords=ageia+physx I have no open 16x slot for an nvidia card. as i only have a pci 1x slot available in my xfire 7970 eyefinnity setup with an asrock extreme 4 3570k. I installed the old ageia drivers rolled back my physx to a amd compatible version can run the ageia demos fine. as soon as i launch a physx enabled game on steam it auto updates the physx driver thus disabling the ageia card any one have a workaround? perhaps a 3570k @ 4.2 ghz cpu is superior to this older ageia ppu and its not worth the effort.