SAPPHIRE HD 7950 3GB OC with Boost Vapor-X Edition has the latest GDDR5 memory clocked at 5000 M Hz effective, & runs with a core clock speed of 850 MHz which with Power Tune Dynamic Boost rises to 950 MHz on the engine. It has a slightly less sophisticated 8-phase power design & the versatile output configuration of Dual-link DVI-I, DVI-D, HDMI & Display Port. The Vapor-X cooler is based on a new vapor chamber designed especially for this series. Heat is carried away by four heatpipes (2 x 8mm plus 2 x 6mm), & finally dispersed by two 90mm fan with aerofoil blades & dust repelling bearings. The Vapor-X cooler easily handles the heat generated from the HD 7950 even under extreme load conditions.