Diamond Viper ATI Radeon HD 2600 XT PCIE 512MB GDDR3 Video Card PCI Express x-16 Radeon HD 2600XT with 800 MHz clock and 512 MB of 128 Bit-GDDR3 Memory 1.4 GHz effective memory speed Dual DVI and HDTV Support Optimized for Windows Vista with Direct X 10 support