ZALMAN Computer Noise Prevention System with Silent Fan and Circular Pure Copper Heatsink CPU Cooler CNPS7000C-CU Pure copper base materials ensure excellent heat dissipation. 92mm fan inside the heat sink maximizes airflow. Compatible with single and dual core CPUs for Intel Socket 1155/1156/775 and AMD Sockets FM2/FM1/AM3+/AM3/AM2+/AM2/754/939/940.