Q: I was just wondering if a NVIDIA GeForce 6600 GT would be a fairly significant upgrade for my current computer, as I currently have a GeForce 5200 FX. They're both AGP mind you.
A: It's a good upgrade, since you need an AGP card, how about getting an Ati HD 3850 AGP? It is an amazing piece of hardware that will run many good recent games and definitely stronger than the 6600 GT.