I have A10 7870k with external R7 250 card Hybrid crossfire. win 8.1. I also have yes a Asus pci x1 genuine ageia physx card. Can I use only the 8.09..04 driver? Will it work with the hybrid crossfire. I think these drivers are before nvidia blocked the use of amd hard ware. Is the Radeon R7s in crossfire better than the Ageia card for physics? Yes I know a dedicated Geforce would probably be better but I experimenting here. Physics card is just wasting away I thoght I woul give it a try.