PowerColor ATI Radeon HD6870 x2 2GB DDR5 2DVI/HDMI/2x Mini DisplayPort PCI-Express Video Card AX6870X2 2GBD5-2DHG Engine Clock: 900 MHz Video Memory: 2GB DDR5 Memory Clock: 1050 MHz (4.2 Gbps) Bus: PCI-Express 2.1 x16 RAMDAC: 400 MHz Stream Processors: 2240 Memory Bandwidth: 268.8 Gbps Max. Resolution: 2560 x 1600