Diamond Viper Radeon HD 2900XT 512 MB GDDR3 Graphics Card Plug-and-play CrossFire support Optimized for Windows Vista with comprehensive DirectX 10 and DirectX 9 support ATI Avivo HD video and display technology 512-bit GDDR3 memory interface Includes a free bundle of three new games from "The Black Box" including Half-Life 2, Portal and Team Fortress 2