Well, I've finally got funds for a gcard upgrade! My dad wanted to buy it, and I am getting an Asus 4850 from a friend for AU$160 (which is a good price over here), which I'll be getting tomorow. I've heard that ATI is good for Source games, which I'm mostly playing, and a 4850 should be a good upgrade from my GT. Is there anything I should know before switching from nVidia to ATI? What program can I use to fully remove the drivers, and what program should I use for overclocking? I'll keep this thread updated once I buy the 4850, and if anyone has any pointers then I'll happily listen!