XFX Radeon HD 7870 Graphic Card - 1000 MHz Core - 2 GB GDDR5 SDRAM - PCI-Express 3.0 x16. RADEON HD 7870 PCIE 2GB DDR5 DUAL DVI/MINIDP HDMI 1000MHZ. 4800 MHz Memory Clock - 4096 x 3112 - CrossFireX - Fan Cooler - DirectX 11.0, OpenGL 4.2, OpenCL 1.2, DirectCompute 11 - HDMI - DisplayPort - DVI