I've just brought a sapphire Hd3650 to replace my old Nvidia 6800GS and I'm having loads of trouble getting to work right, I've used driver cleaner to get rid of the nvidia drivers and I install the 8.3 CAT driver. I'm getting inconsistant FPS in my games for example, Armed assualt is getting about 40FPS but Falcon Allied force is only getting 25FPS, and before on my old card I was getting 40+ FPS in Falcon allied force and about 10 FPS in Armed assualt? Is this a matter of a porked install that requires a format? please some one help!