The classic NF-B9 92mm fan helped to found Noctua’s reputation as a top-tier manufacturer of premium quality quiet cooling components and still impresses users with its exquisite quietness and superb performance.
The new PWM version features Noctua’s novel, custom designed PWM IC for fully automatic control and ultra-low power consumption.

Equipped with Noctua’s signature SSO bearing and topped off with a 6 years manufacturer’s warranty, the NF-B9 PWM is a proven premium choice for the highest demands.


Proven NF-B9 Design

Proven NF-B9 Design
Tens of thousands of quiet cooling enthusiasts swear by Noctua's classic NF-B9.
Its impressive quietness, excellent performance and impeccable, time-tested quality made the B9 a default choice for 92mm quiet cooling.

Bevelled Blade Tips

Bevelled Blade Tips
Reducing critical rotor stator interaction, the NF-B9's Bevelled Blade Tips permit to combine a higher blade surface area with quieter operation and thus form a cornerstone of the fan's outstanding efficiency. 

 Vortex-Control Notches

Vortex-Control Notches
Noctua's signature Vortex-Control Notches split up trailing edge vortices and thus spread the fan's noise emission over a wider range of frequencies.
This measure makes the NF-B9 PWM sound more pleasant to the human ear.

Custom-designed PWM IC with SCD

Custom-designed PWM IC with SCD
Supporting fully automatic PWM speed control, the NF-F12 uses Noctua's novel, custom-designed NE-FD1 PWM IC that integrates Smooth Commutation Drive (SCD) technology. By providing smoother torque impulses, SCD suppresses PWM switching noises and thus makes the fan quieter at lower speeds.

Stops at 0% PWM

Stops at 0% PWM
When the fan is set to 0% PWM duty cycle by the motherboard or PWM fan controller, it will stop.
This makes it ideal for creating setups with semi-passive cooling that automatically turn the fans off and thus run completely silent at idle if thermals allow.

Low-Noise Adaptor

Low-Noise Adaptor
The NF-B9 PWM is supplied with a (L.N.A.) that reduces the maximum fan speed from 1600 to 1300rpm.
The L.N.A. can be used either to run the fan at a fixed speed of 1300rpm or to cap the maximum speed when using automatic PWM control.

Extensive cabling options

Extensive cabling options
The fan's short 20cm primary cable minimises cable clutter in typical applications while the supplied 30cm extension provides extended reach when necessary.
Both cables are fully sleeved and a 4-pin y-cable allows the connection of a second NF-B9 fan to the same PWM fan header for automatic control.


Combining the proven concept of hydrodynamic bearing with an additional magnet that supports the self-stabilisation of the rotor axis, Noctua's time-tested technology has become synonymous with supremely quiet operation and exceptional long-term stability.

6-year manufacturer’s warranty

6-year manufacturer’s warranty
Noctua fans are renowned for their impeccable quality and outstanding longevity.
Like all Noctua fans, the NF-B9 PWM features an MTTF rating of more than 150.000 hours and comes with a full 6-year manufacturer's warranty.
FAN Specification
Size 92x92x25 mm
Mounting hole spacing 82,5x82,5 mm
Connector & pin-configuration 4-pin PWM
Bearing SSO-Bearing
Blade geometry NF-B9 Blade Design
Rotational speed (+/- 10%) 1600 RPM
Rotational speed with L.N.A. (+/- 10%) 1300 RPM
Min. rotational speed (PWM, +/-20%) 300 RPM
Airflow 64,3 m³/h
Airflow with L.N.A. 52,6 m³/h
Acoustical noise 17,6 dB(A)
Static pressure 1,61 mm H₂O
Static pressure with L.N.A. 1,09 mm H₂O
Max. input power 0,96 W
Max. input current 0,08 A
Operating voltage 12 V
MTTF > 150.000 h
Scope of delivery
  • Low-Noise Adapter (L.N.A.)
  • 4-Pin Y-Cable
  • 30cm Extension Cable
  • 4 Vibration-Compensators
  • 4 Fan Screws
Warranty 6 years
  • Noctua NF-B9 PWM
  • Size: 92mm
  • Speed: 1600 RPM +/-10%, 1300 RPM +/-10%
  • SSO-Bearing (Self-stabilising oil-presure bearing)
  • Acoustical Noise: 17.6 db

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Noctua NF-B9 PWM 92mm fan

  • Brand: Noctua
  • Product Code: NF-B9 PWM
  • Availability: In Stock
  • ¥1,881

  • Ex Tax: ¥1,710

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