XFX ATI Radeon HD6670 1 GB DDR5 Displayport/DVI/HDMI PCI-Express Video Card (HD667XZWF4) Chipset: Radeon HD6670 Engine Clock: 800 MHz Video Memory: 1GB DDR5 Memory Clock: 4000 MHz Memory Interface: 128-bit Bus: PCI-Express 2.1 x16 Stream Processors: 480 Max. Resolution: 2560 x 1600