Noctua NF-S12B FLX 120mm Fan Review


Noctua has stormed the PC cooling scene with one award-winning product after another.  Today we will be looking at their high-end NF-S12B case fan!  It's their latest ultra-quiet fan solution, and it incorporates some advanced technology into a fairly "simple" component of your computer, and the performance surely follows!




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.


Size 120x120x25 mm
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)
Acoustical Noise with L.N.A. 10,6 dB(A)
Acoustical Noise with U.L.N.A. 6,2* dB(A)
Static Pressure 1,31 mm H2O
Static Pressure with L.N.A. 0,76 mm H2O
Static Pressure with U.L.N.A. 0,34 mm H2O
Input Power 1,2 W
Input Current 0,1 A
Voltage Range 12 V
MTBF > 150.000 h
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



BBT 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. button

flx 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.

SCD 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. button

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


Now that we have a better picture of what the Noctua NF-S12B FLX has to offer versus other fans, lets now take a look at the real pictures of it!


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