Otherwise, this should work, along with SLI/Crossfire.
Uninstall the drivers from control panel with the exception of ATI drivers.
INTRO: Drivers instruct Windows exactly what hardware you have and what it does, along with any specific features. Note the chipset and BIOS type/date then close the summary window.
Manufacturers usually release new drivers frequently to keep their products updated and add new features. Then open up the tabs: The drivers you want to update: Once you know the drivers, google any with the manufacturer such as nvidia driver and then bookmark the link in a folder.
I would never rely on Windows Update for any drivers - exactly why I downloaded the newest ones and installed them before connecting to the internet for the first time with a new build. Great tutorial, the app for the unknown is back in 2007, I guess the guy gave up on it. I have been using a free app called drivermax for my unknown driver issues.