A790GXM-AD3 is the socket AM3 version from A790GXM-A, which we have already reviewed. It is an ATX-sized motherboard with on-board video based on AMD790GX chipset featuring two x16 PCI Express slots, HDMI output and other interesting features. Let's take a look on this motherboard. A790GXM-A, however, features a dedicated 128 MB on-board video memory in order to increase gaming performance (feature called "Side Port"), which is not present on A790GXM-AD3.