Cheers, any suggestions?? AGP graphics card would have to be. And preferably under £100

I have:

Nvid Geforce FX5600
Intel Pent.4 3 Ghz
Asus P4C800-E Deluze MB
2*512Mb Crucial RAM
2 hard drives = 130 Gig Overall

I think the graphics card is letting me down, am trying to play quake 4 but it just isnt smooth enough on even the lowest settings.

Am I right??

Cheers
Rocky