Multiple Display Adapter Installation

Applies To: Windows Server 2008

Windows Vista and Windows Server 2008 require that when multiple graphics adapters are used in a computer, they must be of the same display driver model type: either Windows Display Driver Model (WDDM), or Windows XP Display Driver Model (XPDM).  If multiple WDDM graphics adapters are present, then they must all use the same WDDM driver. If the either requirement is not met, then Windows uses the adapter that was used to start the computer, and disables any others.

For more information about using specific features of your graphics adapter, visit the manufacturer's Web site. For more information about using multiple graphics adapters and multiple monitors, see "MultiMonitor Support and Windows Vista" at on the Microsoft Web site.


Event ID Source Message



At least one display adapter on the system has been disabled because its driver is not compatible with the driver for the VGA adapter.

Windows Display Driver Model

Core Operating System