Despite the fact that computers have become commonplace at home and at workplaces for a long time, true user friendliness of the computers is still a long shot. Zalman Tech strives to make that goal a closer reality through extensive research and development of its products and will continue to put efforts to creating more enhanced levels of user friendliness in computing. PRODUCT FEATURES: Does not generate noise or vibration in Silent Mode; Pure Copper and Pure Aluminum base material ensures excellent heat dissipation; Intel Pentium 4 (Socket 775), Intel Pentium 4 (Socket 478), and AMD64 (Socket 754/939/940) compatible design for broad compatibility; The large 120mm fan inside the FHS maximizes cooling performance by providing sufficient airflow even at slow rotation speeds; The large 120mm fan provides airflow over a large area, cooling not only the CPU, but the VGA card, Northbridge, FET, and RAM; The adjustable fan speed controller (FAN MATE 2) enables control of noise and fan performance.