Recommended: Support for DirectX 9 graphics with WDDM Driver, 128 MB of graphics memory (minimum), Pixel Shader 2.0 in hardware, and 32 bits per pixel Recommended: 40 GB hard drive with at least 15 GB of available space Required: 20 GB hard drive with at least 15 GB of available space Windows Vista 64-Bit Ultimate for System Builders Single Pack DVD To acquire Windows software with support provided by Microsoft please see our full package 'Retail' product offerings. This OEM System Builder Channel software requires the assembler to provide end user support for the Windows software and cannot be transferred to another computer once it is installed. This software is intended for pre-installation on a new personal computer for resale. Use of this OEM System Builder Channel software is subject to the terms of the Microsoft OEM System Builder License. Learn more about the Windows Vista 64-Bit Ultimate for System Builders Single Pack DVD Disclaimer Disclaimer