Info: The below mentioned details are the minimum system requirements to install Vista as per Microsoft. However, as we know Vista can be installed in the Pcs that meets these requirements or less, which are pretty much close to these requirements.
Windows Vista Home Basic:
* 800-megahertz (MHz) 32-bit (x86) processor or 800-MHz 64-bit (x64) processor
* 512 megabytes (MB) of system memory
* Note On system configurations that use system memory as graphics memory, at least 448 MB of system memory must be available to the operating system after some memory is allocated for graphics.
* 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 of different version of Windows Vista OS and their differences click here
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