I have an XP machine from @2001. It has 750MB of RAM, a DVD drive, a 2Ghz Celeron CPU and an FX5200 Ultra. It ran games like Halo, Half Life, StarCraft, Star Wars: Jedi Knight, Star Wars: Empire at War and Unreal just fine. Star Wars: Knights of the Old Republic was a buggy mess, that crashed way too often. I ended up getting an Xbox to play KOTOR, because of how poor it ran on PC.