I haven't used either, but a friend of mine has used both. From what I saw, the Radeon bombed. In counterstrike, the graphics were cutting up and some parts blurry. With the Ti500, couldn't tell a difference between it and the Geforce 3, but performed better than the Radeon. From what I have read, reports say the Radeon is the best in graphics, where as the Ti500 rates number 1 in speed. My personal opinion is: I would want a better picture so I would go with the Radeon. Sine seeing what I saw, I say to hell with Radeon until they produce better drivers. So Ti500 here I come. 🙂