I'm currently running an 8800GTS 320mb, i'm looking at getting a new card for things like Crysis Warhead, Far Cry 2 etc. Looking at a card around £120-£150 and the obvious choice seems to be the 4850, would just like to know would the change of cards be worth it, would i notice a jump in performance. And can i run the 4850 on a P5NE-SLi board with the Ati card being PCI-E 2.0?