Interestingly enough, while I was reinstalling the network I noticed the AGP is free and the GF4 is on the one I don't know the name of()
Birdman,
Not sure if you are saying that your existing video is PCI or if it is a "built in"....... but ........ if it is PCI........... woah! Most ANY new video card using agp will likely give you quite a performance boost. They don;t call it ACCELERATED graphics port for nothing ;).
best,
.....................john