Sapphire Radeon HD5970 4 GB DDR5 2DVI/Mini-DisplayPort PCI-Express Video Card 100280-4GBB Chipset: Radeon HD5970; Video Memory: 4GB DDR5; Core Clock: 725 MHz Memory Clock: 4 GHz; Memory Interface: 512-bit(2x 256bit); Bus: PCI-Express 2.0 x16; RAMDAC: 400 MHz; Max. Resolution: 2560x1600 Stream Processors: 3200; Connectors: Dual DL-DVI, Mini-DisplayPort; Thermal: Fansink Support Microsoft Windows 7; Support ATI Stream Technology; Support ATI PowerPlay Technology; Support ATI CrossFireX Technology; Support ATI Eyefinity Technology Support Microsoft DirectX 11, Shader Model 5.0 and OpenGL 3.1/3.2; 850W Power Supply with 2x 150W 8-pin PCI Express Power Connectors recommended