Diamond Viper Radeon HD3870 512 MB GDDR4 Overclocked PCI-E 512 MB Memory, 256-bit memory interface GDDR4 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 5.1 surround sound