NF-A12x25 G2 PWM SX2-PP NOCTUA NF-A12x25 G2 PWM SX2-PP

Push-pull set. 120x120x25 mm. 4-pin PWM

The NF-A12x25 G2 PWM Sx2-PP set consists of two NF-A12x25 G2 PWM 120 mm fans with staggered speed, which can be beneficial in push-pull mode and in situations where two or more fans are operated side by side. When two fans are running at almost the same, constant speed in a push-pull configuration or, albeit to a lesser extent, side by side, their acoustic interaction can lead to undesirable harmonic phenomena such as intermittent vibrations or periodic humming due to interference, which can be heard as beat frequencies. Therefore, the two NF-A12x25 G2 PWM fans contained in the Sx2-PP set are slightly offset in speed (+/- ~50 rpm) in order to avoid such phenomena. This fine-tuning is made possible by the fans' novel etaPERF™ motor and its NE-FD6 driver IC that achieves extremely precise speed control and, thanks to its SupraTorque™ feature, can leverage extra torque headroom to keep the exact desired speed even when working against significant flow resistance such as on water cooling radiators and heatsink.