A couple of additional steps are necessary to install multiple monitors on a Windows 8-based system equipped with an Nvidia graphics card. Drivers for midrange to high-end GeForce graphics cards appear not to be included in the Windows 8 Release Preview (we tried with a GeForce GTX 560 Ti, a GeForce GTX 670, and a GeForce GTX 680), so you'll first have to install the necessary drivers for your graphics card. As of this writing, Nvidia Graphics Driver v302.82 is available on the company's website for Windows 8; download those drivers (or a newer opdate if one is available) and install them.
Once the drivers are installed, open the Nvidia Control Panel by right-clicking the desktop and choosing Nvidia Control Panel from the menu. Then click the Set up multiple displays link in the left pane and follow the procedure outlined above to mimic the monitors' positioning.
AMD Radeon Graphics (5000 Series or Newer)
Configuring an AMD Radeon graphics card for multiple monitors under Windows 8 is quite easy. The Windows 8 Release Preview automatically detected and installed drivers from Radeon HD 5000, 6000, and 7000 series cards. Even so, we recommend pointing your browser to AMD.com, and downloading and installing the latest drivers from the company's site. The subsequent setup process for a basic multimonitor configuration is identical to the one for Intel's integrated graphics, which we outlined earlier.
In addition, though, AMD Radeon HD 5000 series (and newer) graphics cards support the company's Eyefinity feature, which users can configure to treat multiple monitors as a single, large surface. Using Eyefinity overrides the edge and corner enhancements that Windows 8 introduces.
To configure Eyefinity after installing the latest AMD drivers, right-click a blank part of the desktop and choose Catalyst Control Center from the menu. In the 'Desktop and Displays' section, click the link for AMD Eyefinity Multi-Display setup. On the next screen, select the Create Eyefinity Display Group option, and follow the on-screen prompts to create the display group. Once you've chosen the correct layout for the display group, you're ready to go.