PowerColor ATI Radeon HD6870 1 GB DDR5 2DVI/HDMI/2x Mini DisplayPort PCI-Express Video Card AX6870 1 GBD5-M2DH Chipset: Radeon HD6870 Engine Clock: 900 MHz Video Memory: 1GB DDR5 Memory Clock: 1050 MHz (4.2 Gbps) Memory Interface: 256-bit Bus: PCI-Express 2.1 x16 RAMDAC: 400 MHz Stream Processors: 1120 Max. Resolution: 2560 x 1600 Connectors: Dual DVI; HDMI; 2x Mini DisplayPort Thermal: Fansink Support Microsoft Windows 7/ Vista/ XP Support ATI CrossFireX Technology Support ATI Stream Technology Support ATI Eyefinity Technology Support ATI PowerPlay Technology