Super Silent Fan 12 PWM is above all a high value performance, quiet operation and a great price. The set contains washers for silicone screws that are responsible for eliminating vibrations. The AAB fans owe their quiet operation to the modern AFDB (Advanced Fluid Dynamic Bearing) bearing. An advantage of this solution is the lifespan of 100,000 hours, which is then longer than with plain bearings. The 12 cm PWM fan for PC case | CPU processor works with a gap of 400~1600 ±10% revolution, automatically set at the BIOS of the motherboard. The airflow is 24.5~63 m3/h even and the noise level produced during its work is about 10~19 dB(A), making it the quietest in its class on the market. Ventilation PC technical data: Total dimensions: 120 x 120 x 25 mm. Ventilo PC weight: 105g Material: plastic. Power supply: 6.5~12V DC/ 0.01A~0.11A/0.1W~1.3W. Power connector: 4 Pins PWM . Compatible with 3 pins (no automatic rotation adjustment) Rotation speed: 400~1600±10% rpm. ±10% Airflow: 24.5~63 m3/h Noise: 10~19dB Bearing: FDB (Fluid Dynamic Bearing) - hydraulic Thermal resistance: 0.29 C/W Mounting hole location: 105 x 105 mm PC fan cable length: 30 cm Durability: 100,000h. Excellent cooling: The cooling of the case relies on the jet of hot air outside. Most often the power supply fan is not able to provide efficient cooling despite its high speed operation and a high noise level. AAB Cooling Super Silent Fan 12 PWM solves this issue.