There is a really great program that totally uses all your comp capabilites. I am at work right now, so i can not tell you what it is right off top my head. If you want it leave a post saying so, and will leave it for when I get home from work.
dfi nfII ultr infinity/asus p4s800
amd 2500xp m/p4 2.6
ati 9600/ati 9600 pro
512mb pc3200/512mb pc3200