Check if your motherboard supports PCI or just AGP. Then go from there. But it doesn't sound like something is working properly. Have you upgraded anything lately?
no i don't think he have pci-e slot becaucse he already have 9600 which is an AGP card, so his motherboard doesn't support PCI-E and that means he can't get 6800GS.
so on the game when i put all the settings on full and the game is laggy that is the gfx card not being good enough? nothing to do with the rest of my pc?