Product Detail Chipset: Radeon HD5850 Engine Clock: 755 MHz Video Memory: 1GB DDR5 Memory Clock: 4.5 GHz Memory Interface: 256-bit Bus: PCI-Express 2.1 x16 RAMDAC: 400 MHz Max. Resolution: 2560 x 1600 Stream Processing Units: 1440 Connectors: Dual DVI, HDMI, DisplayPort Thermal: Fansink support Microsoft Windows 7 Support ATI CrossFireX Technology Support ATI PowerPlay Technology Support ATI Stream Technology Support ATI Eyefinity Technology Support ATI Avivo Technology Support Accelerated Video Transcoding Support HDCP - High-bandwidth Digital Content Protection Support Microsoft DirectX 11, Shader Model 5.0 and OpenGL 3.2 500W Power Supply with 2x 6-pin PCI Express power connectors recommended . The "XFX ATI Radeon HD5850 1 GB DDR5 2DVI/HDMI/DisplayPort PCI-Express Video Card HD585XZABC" is best product for you. We recommended XFX ATI Radeon HD5850 1 GB DDR5 2DVI/HDMI/DisplayPort PCI-Express Video Card HD585XZABC