Diamond Viper Radeon HD4870 512 MB GDDR5 XOC Black Edition PCI-E 512 MB Memory, 256-bit memory interface GDDR5 memory configuration Support for Microsoft Direct X 10.1 / Shader Model 4.1, OpenGL 2.0 Up to 24X Custom Filter Anti-Aliasing High-speed 128-bit-HDR (High Dynamic Range) rendering Built-in HDMI and 7.1 surround sound