Noob question i dont no how to configure my video card?

hi i use to us an nvidia video card and i wuz able to configure that easy but im useing an ati card now and have no idea how to configure it with my nvidia card i had a control panle for it and i dont for my ati video card so someone help ^-^"|||Find your graphics card here http://ati.amd.com/support/driver.HTML then download and install the drivers, if you gave me the exact model i could find you the drivers and post link. Good Luck|||You have to uninstall your old Nvidia driver. Then go to amd.com and download/install the driver for your card. Then you'll get a nice little control panel for it.