be quiet! Pure Wings 3 120mm PWM High-Speed PC Case Fan, Maximum Airflow

Pure Wings 3 120mm PWM high-speed features a closed loop motor. This technology is comparable with the cruise control in cars. When working against resistance, for example a fan grill or radiator, fans spin slower as a result. The closed loop motor technology constantly monitors the current fan speed and increases it to the target rpm, if necessary. As a result, Pure Wings 3 120mm PWM high-speed always operates at the desired speed, no matter the air resistance.
The fan frame outlet is newly designed to minimize air leaks. This benefits especially the radiator performance of Pure Wings 3 120mm PWM high-speed. To reach even higher performance, the fan blades are optimized as well: Their angle is adjusted to achieve even more air pressure, adding up to the extraordinary performance of Pure Wings 3 120mm PWM high-speed.
With a remarkably high air pressure of up to 2.41mm/H2O, Pure Wings 3 120mm PWM high-speed is the best choice for water-cooled and air-cooled systems alike. The 9