CoolTechZone.com posted an overview of Microsoft Windows Vista
On every boot up, Windows took over a minute staying stuck at the black and white Windows "codename" Longhorn screen with Athlon 64 3500+, 1GB (512x2 Dual Channel) of Corsair DDR400 RAM and a 256MB NVIDIA 6600GT. Apparently, Microsoft wasn't kidding when it said that the system requirements are pretty heavy. And it in fact requires a minimum of 512MB of RAM if you want all the slick graphics. Furthermore, for the attractive looking GUI, you will also need a dedicated graphics card with DirectX 9.0 support.Microsoft Windows Vista: An Overview