So my old x800xl died, and I got BFG 8800GTS 512 mb. The card runs CoD 4 great without a problem with 50+fps. But games like STALKER, FEAR, and GRAW 2 run similar my x800xl why is that, I know my 3700 2.4ghz is a bottleneck but the frames improved very little. I have the new beta drivers. Any thoughts.