The ATI Radeon HD 4800 Series GPUs bring the power of supercomputing to gaming graphics. Advance to the next generation of HD game and a life like realism thanks to DirectX 10.1 capabilities and plug-and-play ATI CrossFireX multi-GPU upgradeability. Watch the latest Blu-ray or HD-DVD in full 1080p HD and upscale beyond - without placing huge demands on your CPU. Specifications include 512 MB of memory, 625MHz Core Clock, 993Mhz Memory Clock Speed, GDDR3 Memory Configuration, 256-bit Memory Interface, Display Formats: Dual Link DVI Hydravision 4, architecture unified superscalar shader, PCI Express x 16 2.0, 800 Stream processing units, 147 GB per second memory bandwidth, Direct X 10.1 / Shader Model 4.1, ATI Crossfire X Multi-GPU Support for highly scalable performance (up to four GPUs with an AMD motherboard 790FX based), high-speed 128-bit HDR (High Dynamic Range) rendering Up to 24x anti-aliasing filter, 55nm process technology, ATI Avivo HD Video and Display Technology, Game Physics processing capability, HDMI integrated, multi-channel 5.1 surround audio, Support ATI Radeon DVI to HDMI adapter, Unified Video Decoder (UVD) for Blu-ray and HD DVD, ATI PowerPlay energy conservation, integrated DisplayPort technology , OpenGL 2.0.