You probably do have 2 ports, 1 DVI (White) and 1 VGA (blue). Your Dell 1905 should have came with a DVI cable, and the 6800 card should have came with a VGA adapter for the DVI conversion to VGA. You have multiple options. You just have to play with the monitor settings after you plugged them both in, only one will turn on, the other you got to turn on thorugh the right click on desktop settings.