As far as i know you have to have a cable that you can buy that has 2 monitor cables jacked to 1 cable end, therefore allowing 2 monitors to be hooked up, such as the ATI Radeon 7500, but if you have 2 video cards you can do it that way also, but you might want to check to see if your vid card even can have dual monitors, check in your display settings...i think the dual cable would be your best bet. Can be picked up at any Best Buy.