Sapphire Radeon Vapor-X HD 7970 GHz OC 3GB DDR5 DL-DVI-I/SL-DVI-D/HDMI/DP PCI-Express Graphics Card (11197-12-40G ) 1000/1050(Boost) MHz Core Clock 6000 MHz Effective Memory Clock 1 x Dual-Link DVI 1 x Single-Link DVI-D 1 x HDMI 1 x Display Port Display Port 1.2 OpenGL 4.2