Information Sheet (PDF)

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Cooler Specification

Scope of delivery :                                           Ultra-Low-Noise Adaptor (U.L.N.A.)
                                                                         Low-Noise Adaptor (L.N.A.)
                                                                         4 Vibration Compensators
                                                                         3:4-Pin Adaptor
                                                                         4 Fan Screws
Warranty :                                                         6 years

FAN Specification

Bearing :                                                          SSO-Bearing
Blade Geometry :                                             NF-S12B Blade Design with BBT
Rotational Speed (+/- 10%) :                           1200 RPM
Rotational Speed with L.N.A. (+/- 10%) :         900 RPM
Rotational Speed with U.L.N.A. (+/- 10%) :      600 RPM
Airflow :                                                            100,6 m³/h
Airflow with L.N.A. :                                          75,8 m³/h
Airflow with U.L.N.A. :                                       49,2 m³/h
Acoustical Noise :                                             18,1 dB(A)
Voltage Range :                                                12 V
MTTF :                                                               > 150.000 h

 Noctua>Fan>NF-S12B FLX


Highly optimised impeller with Bevelled Blade Tips
Thanks to its further refined blade geometry with extended leading edges and Bevelled Blade Tips, the NF-S12B achieves up to 10% more airflow and static pressure than its much acclaimed predecessor at the same noise level.

3 speed settings for full flexibility

Providing 1200, 900 and 600 rpm speed settings via the supplied Low-Noise and Ultra-Low-Noise Adapters, the FLX (Flexibility) version can be fine-tuned for superior airflow or maximum quietness.

Smooth Commutation Drive 2

The latest version of Noctua's advanced SCD drive system ensures superb running smoothness by eliminating torque variations and switching noises.


Noctua's time-tested SSO-Bearing technology has become synonymous with supremely quiet operation and exceptional long-term stability.

 NF-S12B FLX​ 

Product discontinued. Successor model: NF-S12A FLX

Succeeding the vastly successful NF-S12, the NF-S12B is a next generation quiet fan featuring Noctua's advanced SCD2 technology as well as a highly optimised blade geometry with Bevelled Blade Tips that improves its award-winning predecessor's airflow efficiency by up to 10%. Topped off with Noctua's time-tested SSO-Bearing, 6 years warranty and versatile 1200/900/600 rpm speed settings, the NF-S12B FLX is a premium quality fan that offers full flexibility in quiet to ultra-quiet case cooling.