Cooler Master CPU Cooling Fan CI5-6C11B-02 is a black 80mm CPU fan with heatsink designed for INTEL LGA 775 SOCKET compatibility. It features a ball bearing type, aluminum and copper materials, and a maximum airflow volume of 50 CFM. The fan operates at a maximum speed of 1800 – 3500 RPM, with a 4-pin power connection and a voltage of 12V. Made in China, it is suitable for 3U and up form factors.