generally, if your gcard has two slots, plug the othr monitor in the second one and it will work imediately. Sometimes the second slot is a DVI one, which needs a different type of plug or a converter. When i say it works instantly, its because the drivers on the computer are already set to take two monitors. Saying that, you might want to check your display settings to see if it has a '2' in a second, greyed out box - this lets you tune the second monitor, and if its there, all systems go i suppose.