Diamond 4850PE3512V ATI Radeon HD 4850 PCIE 512MB GDDR3 Dual DVI Video Card 512 MB Memory with dual 256 bit memory interface and GDDR3 memory configuration 625 mhz core clock and 993 MHz memory clocks Support for Microsoft Direct X 10.1 Shader Model 4.1 and OpenGL 2.0 Up to 24X Custom Filter Anti-Aliasing Built-in HDMI and 5.1 surround sound