Noctua NF-A9 PWM, Premium Quiet Fan, 4-Pin (92mm, Brown)
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Mark L. Sulloway
04-06-2025Easy to swap out this taller fan on the Noctua L9-A cooler for slower fan speeds as the longer screws are included with the cooler.
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Computer John
> 3 dayCan you even go wrong with a Noctua product? Yes, they are expensive, but they are a performance product at a great price.
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Eric Krauter
> 3 daySuper quiet and never had one quit.
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Rich
06-06-2025Very quiet even when idling, as a rear case fan, at about 870 - 900 rpm and lowered case temp.
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Brandon Miller
> 3 dayBought this for my Synologys NAS. Even though 92mm fans are known to be loud. This definitely keeps the noise down. Hands down the best one.
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Tristin Rempel
Greater than one weekThis fan lives up to its reputation. A lot of extra goodies come with it, easy to install, very quite, and moves air through my TX3 wonderfully. The two-tone shades of brown are not easy on the eyes, but that doesnt take away from the fans performance. A shout out to Noctua for making great fans.
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SpeedD408
Greater than one weekNoctua fans are quiet, efficient and typically lower inside case temps. They are fantastic.
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RetiredGi
> 3 dayI used this fan to replace the 14mm fan on a low profile cpu cooler. It runs quietly and keeps an 84 watt I5 cool under full cpu loads.
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Dutch Apple
> 3 dayReplaced my stock computer exhaust fan with this one. Easy to install and very quiet while being efficient at exhausting air out of my computer.
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Kenneth
> 3 dayUsed this fan for a rear exhaust fan.
The NF-A9 is a highly optimised, premium quality quiet 92mm fan. Featuring Noctua’s AAO (Advanced Acoustic Optimisation) frame as well as sophisticated aerodynamic design measures such as Flow Acceleration Channels, the NF-A9 further improves the renowned quiet cooling performance of the award-winning NF-B9. The PWM version sports Noctua’s custom designed NE-FD1 IC for fully automatic speed control via 4-pin fan headers and comes with a Low-Noise-Adaptor to reduce the maximum speed during PWM control from 2000 to 1550rpm. Its superb running smoothness, reference-class SSO2 bearing and Noctua’s trusted premium quality make it an elite choice for the highest demands.
AAO frame
Noctua"s AAO (Advanced Acoustic Optimisation) frames feature integrated anti-vibration pads as well as Noctua"s proprietary Stepped Inlet Design and Inner Surface Microstructures, both of which further refine the fan"s performance/noise efficiency.
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Flow Acceleration ChannelsThe 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. |
SSO2 bearingThe NF-A9 features the further optimised second generation of Noctua"s renowned, time-tested SSO bearing. With SSO2, the rear magnet is placed closer to the axis to provide even better stabilisation, precision and durability. |
Integrated anti-vibration padsIntegrated anti-vibration pads made from extra-soft silicone minimise the transmission of minute vibrations while maintaining full compatibility with all standard screws and other mounting systems. |
Scope of delivery
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Inner Surface Microstructures
With the tips of the fan blades ploughing through the boundary layer created by the Inner Surface Microstructures, flow separation from the suction side of the blades is significantly suppressed, which results in reduced blade passing noise and improved airflow and pressure efficiency.
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| NF-A9 PWM | NF-A9 FLX | NF-A9 5V PWM | NF-A9 5V | NF-A9 PWM chromax.black.swap | |
| Connector | 4-pin PWM | 3-pin | 4-pin PWM | 3-pin | 4-pin PWM |
| Voltage | 12V | 12V | 5V | 5V | 12V |
| RPM | Max: 2000 / Min: 400 | 1600 | Max: 2000 / Min: 400 | 2000 | Max: 2000 / Min: 400 |
| RPM with L.N.A. | 1550 | 1250 | - | - | - |
| RPM with U.L.N.A. | - | 1050 | - | - | - |
| Acoustical Noise | 22,8 dB(A) | 17,1 dB(A) | 22,8 dB(A) | 22,8 dB(A) | 22,8 dB(A) |
| Acoustical Noise with L.N.A. | 16,3 dB(A) | 11,6 dB(A) | - | - | - |
| Acoustical Noise with U.L.N.A. | - | 8,4 dB(A) | - | - | - |
| Size | 92x92x25 mm | 92x92x25 mm | 92x92x25 mm | 92x92x25 mm | 92x92x25 mm |
| Colour | Brown & Beige | Brown & Beige | Brown & Beige | Brown & Beige | Black with swappable coloured anti-vibration pads |