ZALMAN Computer Noise Prevention System with Blue LED Fan and Circular Pure Copper Heatsink CPU Cooler CNPS7000B-CU LED Pure copper and pure aluminum 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.