PowerColor ATI Radeon HD6790 1 GB DDR5 DVI/HDMI/Mini DisplayPort PCI-Express Video Card AX6790 1GBD5-DH Chipset: Radeon HD6790 Engine Clock: 840 MHz Video Memory: 1GB DDR5 Memory Clock: 1050 MHz (4.2 Gbps) Max. Resolution: 2560 x 1600 Connectors: DVI; HDMI; Mini DisplayPort Support Microsoft DirectX 11, Shader Model 5.0 and OpenGL 4.1