The way I understood it is that all PCIe are compatible with each other. I have H61M-P31 (G3) mobo. The chipset intel h61 says pcie 2.0 and my cpu I got for the mobo is Celeron g530 witch also says pcie 2.0. Anyways im trying to put a pcie 1.0 graphics card into my mobo and I get no display but the fan on the card is running so I know its getting power. I see no option in bios to turn off the onboard video but im not sure this is even what I need to do or if that will make it work, can someone help me get this card going I know it works I tried it in another mobo and it started up/worked just fine, wish it would work for the H61M-P31 (G3) mobo. I think its not switching to the pcie card because while the computer is running and I have monitor plugged into the vga slot on the pcie card and the monitor is black, but as soon as I plug it into the vga slot on the mobo I get a visual. Can someone tell me why this happens.