Fit the graphics card into the AGP slot. Can be quite stiff, make sure its fully inserted and attach with a screw to the back plate. Unlike my old MSI board, this one had a nifty clip at the opposite end, which really makes it a secure fit. Don't install PCI cards yet (modem/sound/whatever), wait till we've checked the rest is working. [in the photo, three of the PCI slots are visible on the left of the graphics card]