The SAPPHIRE HD 7950 3GB with Boost features SAPPHIRE"s new dual-extractor technology - Dual-X - a highly efficient multi-heat pipe cooler with dual fans providing quiet and very cool operation during normal operating conditions, and superb cooling performance even under extreme load. SAHHPIRE HD 7950 3GB with Boost now has the latest GDDR5 memory clocked at 5000MHz effective, and runs with a core clock speed of 850 MHz which with Power Tune Dynamic Boost rises to 925 MHz on the engine. For enthusiasts wishing to maximize performance, a new version of the SAPPHIRE overclocking tool, Twix supporting this latest generation of technology is available free to download from the SAPPHIRE website. Twix allows tuning of GPU voltage as well as core and memory clocks, whilst continuously displaying temperature. Manual control of fan speed is supported, as well as user created fan profiles and the ability to save up to four different performance settings.