NF-A14-X25R G2 PWM SX2-PP NOCTUA NF-A14-x25r G2 PWM Sx2-PP, 2x 140 mm

The NF-A14x25r G2 PWM Sx2-PP is a set of 2 NF-A14x25r G2 PWM round-frame fans 140 mm in diameter for push-pull operation on heatsinks such as the NH-D15(S) or NH-U14S.

When two fans in a push-pull configuration operate at a virtually identical constant speed, their acoustic interaction can lead to undesirable harmonic phenomena such as intermittent vibration or periodic hum due to interference audible as vibration frequencies. Therefore, the two NF-A14x25r G2 PWM fans included in the Sx2-PP set are slightly offset in speed (+/- ~25 rpm) to avoid such phenomena. This fine-tuning is made possible by the novel etaPERF™ fan motor and its NE-FD6 driver IC, which achieves extremely precise speed control and, thanks to its SupraTorque™ function, can use additional torque room to maintain the required speed even when operating against a significant flow resistance, such as on heatsinks.