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Item #: NFB9PWM
Reg. Price: $19.95
Our Price: $15.95
In Stock


Please note:  This model has been phased out by Noctua and has been replaced by the new NF-A9 PWM.


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.


Noctua NF-B9 PWM Features

Noctua NF-B9 PWM
Image shows the 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.

Image shows the Beveled Blade Tips logo.

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

Image shows the 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.

Image shows SSO Bearing logo.

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

Image shows Custom designed PWM IC with SCD logo.

Custom designed PWM IC with SCD
Supporting fully automatic PWM speed control, the NF-B9 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.

Image shows Low-Noise Adapter logo.

Low-Noise Adapter
The NF-B9 is supplied with a Low-Noise Adapter (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.

Image shows Extensive Cabling Options logo.

Extensive Cabling Options
The fan’s short 20cm primary cable minimizes 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 to connect a second NF-P12 fan to the same PWM fan header for automatic control.

Image shows 6 years manufacturer’s warranty logo.

6 years Manufacturer's Warranty
Noctua fans are renowned for their impeccable quality and outstanding longevity. Like all Noctua fans, the NF-B9 features an MTBF rating of more than 150.000 hours and comes with a full 6 years manufacturer's warranty.


Noctua NF-B9 PWM Specifications

Noctua NF-B9 PWM
Size 92x92x25 mm
Connector 4-pin PWM
Bearing SSO
Blade Geometry NF-B9 Blade Design
Rotational Speed (+/- 10%) 1600 RPM
Rotational Speed with L.N.A. (+/- 10%) 1300 RPM
Min. Rotational Speed (PWM)(+/- 10%) 300 RPM
Airflow 64.3 m³h - 37.85 cfm
Airflow with L.N.A. 52.6 m³h - 30.96 cfm
Acoustical Noise 17.6 dB(A)
Acoustical Noise with L.N.A. 13.1 dB(A)
Static Pressure 1.61 mm H2O
Static Pressure with L.N.A. 1.09 mm H2O
Max. Input Power 0.96 W
Input Current 0.08 A
Voltage Range 12V
MTBF > 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


More Information


If you are a reseller or a system builder we offer special pricing on bulk orders of this product. Contact us at or call Toll Free (877) 205-2020 for more information.

Quiet PC USA is the North American Exclusive Distributor for Acousti Products and an authorized US distributor for Coolink, Cubitek, Noctua, and NOFAN manufacturers. Image shows US and CAN flags.

Quiet PC USA is the Exclusive North American distributor for Acousti Products and an authorized US distributor for Coolink, Cubitek, Noctua, and NOFAN Corporation manufacturers of quiet computer components and acoustic sound proofing materials.

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