Zalman Silent Fan, Circular Aluminum and Copper Cooling cnps7000-alcu Red/Silver The device is built with pure copper and pure aluminum for cost-effective cooling performance and noise level. 92mm fan inside the heat sink maximizes airflow. CNPS7000-AlCU is low-profile aftermarket CPU cooler exclusively compatible with older generation of AMD and Intel CPUs. The CNPS7000-ALCU is designed based on the patented FHS radial design with minimal clearance issues with the surrounding components which is ideal for chassis with limited space