Discontinued
NF-B9 PWM
92x25mm fan
Proven NF-B9 design
Tens of thousands swear by the classic NF-B9
SSO Bearing
Time-tested SSO-Bearing for exceptional long-term stability
4-pin PWM version
For automatic speed control
Tens of thousands swear by the classic NF-B9
Time-tested SSO-Bearing for exceptional long-term stability
For automatic speed control
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.
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.
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.
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.
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.
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.
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.
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.