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Brown 92mm square case fan with textured blades and rubber corner pads

Noctua

Noctua NF-A9 PWM 92mm case fan 4-pin 2000 RPM brown

SKU CH-4KM3-J6Q6Q MPN NF-A9 PWM

A premium quiet 92mm PWM fan with AAO frame and Flow Acceleration Channels, 400–2000 RPM range, 46.44 CFM airflow, 22.8 dB(A) noise.

  • Fan Counts1 Fan
  • Fan ControllerNo Controller
  • TypeCase Fan
  • CompatibilityCPU Cooler, Water-Cooling Radiator and Case
  • Fan Size92mm
  • Fan Thickness25mm

Model PWM

  • PWM
  • FLX
  • 5V PWM
  • 5V
  • chromax

Struck-through versions exist but are not stocked here.

  • Premium quiet cooling with AAO frame and Flow Acceleration Channels
  • 4-pin PWM automatic speed control across 400-2000 RPM range
  • Low-Noise Adaptor reduces maximum speed to 1550 RPM at 16.3 dB(A)
  • SSO2 bearing rated for over 150000 hours MTTF
  • Includes vibration compensators, Y-cable and 30cm extension cable

Premium 92mm PWM fan for compact builds

The NF-A9 PWM is a 92mm case fan designed for CPU coolers, water-cooling radiators and small-form-factor cases where space is limited. Its 4-pin PWM connector enables automatic speed control from 400 to 2000 RPM through standard motherboard headers. The brown colour scheme matches Noctua's signature aesthetic without any LED lighting.

Sustained airflow with acoustic optimisation

Flow Acceleration Channels on the impeller reduce flow separation at the outer blade regions, maintaining efficiency during continuous operation. The Advanced Acoustic Optimisation frame integrates anti-vibration pads, Stepped Inlet Design and Inner Surface Microstructures to lower vortex noise. At full 2000 RPM the fan delivers 46.44 CFM at 22.8 dB(A); with the supplied Low-Noise Adaptor it runs at 1550 RPM for 36.84 CFM at 16.3 dB(A).

SSO2 bearing and versatile mounting kit

The self-stabilising oil-pressure bearing is rated for more than 150000 hours MTTF, supporting long-term reliability under constant load. In the box you receive four vibration-compensating mounts, four fan screws, a 30cm extension cable and a 4-pin Y-cable for running two PWM fans from one header. The 92x92x25mm frame fits standard 92mm mounting patterns without modification.

Highlights

  • Premium quiet cooling with AAO frame and Flow Acceleration Channels
  • 4-pin PWM automatic speed control across 400-2000 RPM range
  • Low-Noise Adaptor reduces maximum speed to 1550 RPM at 16.3 dB(A)
  • SSO2 bearing rated for over 150000 hours MTTF
  • Includes vibration compensators, Y-cable and 30cm extension cable

Specifications

BrandNoctua
ModelNF-A9 PWM
Fan Counts1 Fan
Fan ControllerNo Controller
TypeCase Fan
CompatibilityCPU Cooler, Water-Cooling Radiator and Case
Fan Size92mm
Fan Thickness25mm
Bearing TypeSSO2 ( Self-stabilising oil-presure bearing )
RPM2000 RPM (standard ), 1550 RPM (w/ L.N.A ), 400 RPM (Mini Rotation Speed)
Air Flow46.44 CFM (standard), 36.84 CFM (w/L.N.A. )
Noise Level22.8 dB(A)/standard, 16.3 dB(A)(w/ L.N.A )
Power Connector4 Pin
ColorBrown
LEDNo
FeaturesSucceeding the award-winning NF-B9
Noctua's NF-B9 fan has become a default-choice among PC enthusiasts looking for a premium quality quiet 92mm fan. Thanks to its thoroughgoing aerodynamic optimisations, the NF-A9 provides higher static pressure and an even better airflow/noise ratio than its much acclaimed predecessor.
Flow Acceleration Channels
The NF-A9 impeller features suction side Flow Acceleration Channels. By speeding up the airflow at the crucial outer blade regions, this measure reduces suction side flow separation and thus leads to better efficiency and lower vortex noise.
Dimensions92.00 x 92.00 x 25.00 mm
Package ContentsLow-Noise Adaptor (L.N.A.)
4-Pin Y-Cable
30cm Extension Cable
4 Vibration-Compensators
4 Fan Screws
Shipping weight0.24 kg
Package size211 × 152 × 32 mm

Questions about this item

How loud is the NF-A9 PWM at its standard 2000 RPM speed?

At 2000 RPM the fan produces 22.8 dB(A). With the supplied Low-Noise Adaptor limiting speed to 1550 RPM, noise drops to 16.3 dB(A).

Does the NF-A9 PWM need a 4-pin PWM header on the motherboard to run?

Yes, the 4-pin PWM connector plugs into a standard 4-pin fan header for automatic speed control between 400 and 2000 RPM.

Will the NF-A9 PWM fit the screw pattern of my older 92mm case or cooler?

The fan uses the standard 92mm mounting holes (92.00 x 92.00 mm) and includes vibration-compensating mounts plus regular screws for backward-compatible installation.

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