The ATI Radeon HD 4800 Series of GPUs bring the power of graphics supercomputing to gaming. Advance to the next generation of HD game performance and life-like realism thanks to DirectX 10.1 capabilities and plug-and-play ATI CrossFireX multi-GPU upgradeability. Watch the latest Blu-ray and HD-DVD videos in full 1080p HD ¿ and upscale beyond - without placing huge demands on your CPU. Technical Specs: 2GB Memory, 750Mhz Core Clock x2, 990Mhz Memory Clock x2, GDDR5 Memory Configuration, 256-bit Memory Interface x2, Display Formats: Hydravision 4 Dual Link DVI, Superscale unified shader architecture, PCI Express x 16 2.0 support, 800 Stream Processing units x2, 180.6 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 GPU support with an AMD 790FX based motherboard), High-speed 128-bit-HDR (High Dynamic Range) rendering, Up to 24x Custom Filter Anti-Aliasing, 55nm process technology, ATI Avivo HD Video and Display Technology, Game Physics processing capability, Built-in HDMI with Multi-channel 7.1 surround audio, Support for the ATI Radeon DVI to HDMI adapter, Unified Video Decoder (UVD) for Blu-ray and HD DVD, ATI PowerPlay energy conserving technology, Built-in DisplayPort technology, OpenGL 2.0 Support System Requirements: AMD Athlon or Intel Pentium 4, PCI Express based PC is required with one X16 lane graphics slot available on the motherboard, 250 Watt or greater power supply (450 Watt for ATI CrossFireX with two 6-pin connectors) , 1GB of system memory, Installation software requires CD-ROM drive, DVD playback requires DVD drive, Blu-ray / HD DVD playback requires Blu-ray / HD DVD drive.