RE: will g3 work on my pc?
I agree...and 1 gb of RAM is recommended too. Try it to see, if you're already inclined to buy, but keep the piggy-bank handy. I'd recommend the X800 Pro or 6800 GT. I run the 6800 GT and it works like a dream...problem is, the card is 400 bucks with a doom bundle. You might be able to find one a tad cheaper without the bundle.
Good luck!
Sys:
Athlon 64 3200+ w/1gb RAM. 300gig hard drive space. EVGA 6800GT video.
Charles