I have a Dimension 4600 with a NVIDIA GeForce FX 5200 that I want to replace. It says its on PCI bus 1 in the Device Manager. I haven't bought a video card in a while. Does this mean that I need a PCI express card? I am looking at the mother board, and I don't see any other slots but regular PCI. Best Buy has the Radeon 9250 on sale for $100 this week and I might get one tomorrow, unless someone tells me not to.