ATI Radeon HD 4850 1GB DDR3 PCI Express (PCI-E) Dual DVI Video Card w/HDCP Support ATI Radeon HD 4850 1GB GDDR3 PCI Express Dual DVI Video Card General Features: ATI Radeon HD 4850 graphics processing unit (GPU) 800 stream processing units 625 MHz core clock 1 GB GDDR3 memory 256-bit memory interface PCI Express 2.0 support Microsoft DirectX 10.1 support w/Shader Model 4.1 OpenGL 2.0 optimization and support 24x custom filter anti-aliasing (CFAA)