I have a GF4 (Ti4800SE) and can run it 1280*1024 all the settings full up and on a 21" monitor it looks sweet!
BTW - My best time is 24.37secs and yes I do have a screenshot to prove it ... I think I'm second best on the NFS site (best is 24.21 I think).
http://team.amd3d.com/unrealrocks/2437sec.jpg
(I am a bit of a Racing sim nut, lol)