ZALMAN Computer Noise Prevention System with Silent Blue LED Fan, Aluminum and Copper Heatsink CPU Cooler CNPS7700-ALCU LED Pure Copper and Pure Aluminum base material ensures excellent heat dissipation The large 120mm fan inside the FHS maximizes cooling performance by providing sufficient airflow even at slow rotation speeds. Compatible with all single and dual core CPUs for Intel Socket 1155/1156/775 and AMD Sockets 754/939/940.