Diamond Viper 3650PE512 ATI Radeon HD 3650 PCIE 512 GDDR2 Video Card PCI-Express x16 graphics card featuring the ATI Radeon 3650 GPU for great gaming performance at a reasonable price 512 MB of GDDR2 RAM running on a 128-bit interface at 800MHz; graphics processor has core clock speed of 725 MHz Supports Crossfire X for easy upgradeability by adding a second graphics card Support for full DirectX 10.1 and Shader Model 4.1, and OpenGL 2.0 Backed by a 1-year warranty