HIS Radeon HD 6850 IceQ X Turbo 1 GB (256bit) GDDR5 Eyefinity DisplayPort HDMI 2x DVI (HDCP) PCI Express X16 2.1 Video Card Retail (RoHS) H685QNT1GD Chipset: ATI Radeon HD6850 Engine Clock: 820 MHz Video Memory: 1GB DDR5 Memory Clock: 4400 MHz Memory Interface: 256-bit Bus: PCI-Express 2.0 x16 RAMDAC: 400 MHz Max. Resolution: 2560 x 1600