Diamond X1650AGP256TSB ATI Radeon Viper X1650 Pro 256MB AGP GDDR2 Dual DVI Video Card AGP 3.0 compatible 256MB Memory with 128 bit memory interface and GDDR2 memory configuration 600 mhz core clock and 800 MHz memory clock Support for Microsoft Direct X 9.0 and OpenGL 2.0 Dual link DVI for dual monitor support