Diamond 4870PE51G ATI Radeon HD 4870 PCI-Express 1GB GDDR5 Dual DVI Video Card 1GB Memory with 256-bit memory interface and GDDR5 memory configuration Support for Microsoft Direct X 10.1 Shader Model 4.1 and 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