Sapphire HD 7970 Vapor-X Edition has the GDDR5 memory clocked at 6000 MHz effective, & runs with a core clock speed of 1000 MHz which with Power Tune dynamic boost rises to 1050 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 vapor chamber designed especially for this series. Heat is carried away by four heatpipes, & finally dispersed by two 90 mm fan with aerofoil blades & dust repelling bearings. The Vapor-X cooler easily handles the heat generated from the HD 7970 GHz Editions even under extreme load conditions.