Go to Mainboard then down at the bottom it says graphic interface, then in the version it tells you, mine for instance says PCI-Express.
Open up the case if u see a BROWN slot some where next to the Dial-up modem its PCI Express,and if u have a BLUE (i belive its blue)slot its PCI Expres x16,if all u have its WHITE slots then ur VGA
color is irrelevant, my old board was colored yellow for all slots. brown is standard for AGP, white for PCI-e and white for PCI. only way to easily tell is open the case and to examine the slot. AGP and PCI-e slots are typically indented a bit back from the PCI slots. 99% of boards have PCI slots. AGP slots typically have a latch on the back PCI-e typically don't. also CPU-z mainboard, graphics interface. if it says nothing, you have PCI.
LMFAO... Well, that means that you will have to get PCI. Very seldome do they have AGP + Integrated. Also, I think we have proven you need PCI with CPU-Z anyways. So, I think I will keep it at that. Because, I don't know video cards for PCI slots and I am going to bed. I will help you tomorow if you still need it.