XFX Double D Fx-797a-tdkc Radeon Hd 7970 3gb 384-bit Gddr5 PCI Express 3.0 X16 Hdcp Ready Crossfirex Support Video Card 5500 MHz Memory Clock 4096 x 2160 CrossFire Fan Cooler DirectX 11.0, OpenGL 4.2, DirectCompute 11, OpenCL 1.2