1GB ram if possible
the graphic card isnt that bad, i have the same one and everything looks quite good!
the CPU is good too!
oh and a new HD, UT2K4 needs already 5.5 GB

and every new game more than 1 GB
this PC would be enough for a year or a bit more
but if you want to see good graphics etc. (what isnt the important thing in gaming) you should get a radeon XT, but as a gamer, you dont look at the graphic you look at your FPS and i play UT2K4 on lowest detail to get somewhere around 130 FPS

(i know i'm sick =)
Creatures