Sapphire Radeon HD 7870 Graphic Card - 1 GPUs - 1050 MHz Core - 2 GB GDDR5 SDRAM - PCI-Express 3.0 x16 - 5000 MHz Memory Clock - 4096 x 2160 - CrossFireX - Fan Cooler - OpenGL 4.2, DirectCompute, DirectX 11.0 - HDMI - DisplayPort - DVI. The new SAPPHIRE HD 7800 series of graphics cards is based on the third family of GPU"s from AMD built in its new 28nm process and featuring the highly acclaimed GCN graphics processing architecture. The SAPPHIRE HD 7870 GHz Edition OC, factory-overclocked to 1050 MHz engine and effective 5000 MHz memory, offers superior performance than standard models. It is equipped with SAPPHIRE"s new dual-extractor technology - Dual-X - a highly efficient multi-heatpipe cooler with dual fans providing quiet and very cool operation during normal operating conditions, and superb cooling performance even under extreme load.