Zalman CNPS7000C-ALCU 92mm 2 Ball Cooling Fan 1. Does not generate noise or vibration in Silent Mode. 2. Pure Copper and Pure Aluminum base materials ensure excellent heat dissipation. 3. Socket FM2/Socket 940/939/754/Socket AM2+/AM2/Socket AM3+/AM3/Socket FM1/Socket 775/Socket 1156/Socket 1155 compatible design. 4. 92mm fan inside the FHS maximizes airflow and makes installation easier. 5. Adjustable fan speed controller (FAN MATE 2) enables control of noise and fan performance.