My main prefered games are fps and racing, the odd 3rd person, anything good really
I don't know my old AMD processors too well, but I actually used to have that exact video card and, if I'm picturing the timeframe of that hardware correctly, you'd probably be able to do well with some of the early Steam stuff. Of course, when talking lan and fps in that generation, my mind would immediately shoot to the original counterstrike, and for single player, the classic half life.
I took a look at some of the minimum specs for Source-age games, too, and it looks like you would probably be able to handle things like Half-life 2 and counterstrike source, at least at playable levels. I also have a friend who swears by some of the early-mid 2000's Wolfenstein games.
Racing... I'm not so sure about. I haven't done much PC racing, so all I can think of are the modern games that would be a bit much for that system.
And then various semi-old school classics that come to mind... Diablo II, Morrowind, etc. Depends on your tastes, really!
I would page through the store here
and check out some of the system requirements, maybe download a demo or two.