System requirements for Windows Vista KB 919183

Recommended minimum hardware requirements for Windows Vista

The following list describes the recommended minimum hardware requirements for basic functionality of the different editions of Windows Vista. Actual hardware requirements will vary, depending on system configuration and on the programs and the features that you install. If you install Windows Vista over a network, additional hard disk space may be required.

Windows Vista Home Basic • 800-megahertz (MHz) 32-bit (x86) processor or 800-MHz 64-bit (x64) processor • 512 megabytes (MB) of system memory • DirectX 9-class graphics card • 32 MB of graphics memory • 20-gigabyte (GB) hard disk that has 15 GB of free hard disk space • Internal or external DVD drive • Internet access capability • Audio output capability

Windows Vista Home Premium, Windows Vista Business, Windows Vista Enterprise, and Windows Vista Ultimate • 1-gigahertz (GHz) 32-bit (x86) processor or 1-GHz 64-bit (x64) processor • 1 GB of system memory • Windows Aero-capable graphics card Note This includes a DirectX 9-class graphics card that supports the following: • A WDDM driver • Pixel Shader 2.0 in hardware • 32 bits per pixel • 128 MB of graphics memory (minimum) • 40-GB hard disk that has 15 GB of free hard disk space (the 15GB of free space provides room for temporary file storage during the install or upgrade.) • Internal or external DVD drive • Internet access capability • Audio output capability

Note A Windows Aero-capable graphics card is a graphics card that meets the following requirements:

•	Supports a Windows Display Driver Model (WDDM) driver
•	Has a DirectX 9-class graphics processor unit (GPU) that supports Pixel Shader 2.0
•	Supports 32 bits per pixel
•	Passes the Windows Aero acceptance test in the Windows Driver Kit (WDK)

For more information about the different editions of Windows Vista, visit the following Microsoft Web site: