XFX ATI Radeon HD6770 1 GB DDR5 VGA/DVI/HDMI PCI-Express Video Card HD677XZNLC Chipset: Radeon HD6770; Engine Clock: 850 MHz Video Memory: 1GB DDR5; Memory Clock: 4800 MHz; Memory Interface: 128-bit; Bus: PCI-Express 2.1 x16 RAMDAC: 400 MHz; Stream Processors: 800; Max. Resolution: 2560 x 1600; Connectors: VGA, DVI, HDMI; Thermal: Fansink Support Microsoft Windows 7; Support ATI CrossFireX Technology; Support ATI Stream Technology; Support AMD Eyefinity Technology; Support AMD Accelerated Parallel Processing (APP) Technology; Support HDCP - High-bandwidth Digital Content Protection; Support Microsoft DirectX 11, Shader Model 5.0 and Open GL 4.1; Minimum Power Requirement: 650W Support ATI PowerPlay Technology; Support AMD HD3D Technology