In order to run Vista there are specific hardware requirements that have to be met. These are preliminary and could change once the end product is released:
CPU: x86-compatible 32-bit or x64-compatible 64-bit microprocessor(s) (Dual-core systems will be supported on all editions except Starter, and multiple physical processors are supported on Business, Enterprise and Ultimate editions)
Motherboard: ACPI-compatible firmware is required.
Memory: At least 512 megabytes of physical memory. Microsoft is also encouraging the use of ECC memory to improve stability.
Graphics Card: A DirectX 9–compatible GPU that is capable of supporting Windows Display Driver Model (WDDM) (only needed for aero glass) and has 64 megabytes of VRAM at minimum.
Hard Drive space: At least 3 gigabytes for installation files, possibly more, depending on the edition of Windows Vista.
Display: Copy-restricted high-definition digital content, such as next-generation HD DVD movies, can be displayed at a reduced resolution of 480p (DVD quality) or 540p if the copyright owner desires, unless viewed on a High-Bandwidth Digital Content Protection (HDCP)-compatible monitor. Very few existing displays and retail video cards are compliant with this standard.
