Motherboard-video card compatibility (GA-G31M-ES2L)

hello, back with another question, mainly to anyody with experience with the GA-G31M-ES2L

i'm looking to incorporate this mobo into my new build but i'm not sure which video card to go with, i was looking at the specs for the ATI Radeon HD4670 and looking at the interface, it says PCI-E 2.0 and when i pulled up the details for the mobo it seem to lack details on the PCI-E version it utilises. so if anyone would happen to know, that would be much appreciated, thanks.