Call of duty 4 -video card problems?

i just recently bought COD4 and a video card error comes up, i need to upgrade, but my monitor plugs straight into the motherboard, since my video card is hooked up to the mother board what type of video card do i need to look for. if any suggestions also.|||you have an intergrated vid card. basically it's built into the mother board and it sucks.

COD4 need a minimium of a radeon 9800pro or geforce 6600.



Before you buy check what slots you have in your comp. open the side of your comp. in the bottom left corner there will be a bunch of slots. smaller white/yellow are PCI(the worst) larger black/brown/red/orange are AGP(okay) Larger white or yellow slots in place of the agp slots are PCI EX(the best).

http://www.machspeed.com/specs/PT88BSPRO…

(PCI and PCI EX slots, pic is rotated so left side is the bottom)

when you buy a vid card make sure you know the slot you have and the slot the vid card needs.