Noctua NF-A9 PWM, Premium Quiet Fan, 4-Pin (92mm, Brown)
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James Bowen
Greater than one weekIm currently in the process of building an ultra small expandable PC, and I had purchased a Noctua NH-l9i cpu cooler. I had been able to achieve a stable clock rate of 4.6 GHz, unfortunately in testing the cpu would hit the thermal throttling point. I wanted to see if I could push the overclocking boundary a bit, so I replaced the thin fan with this one. Theoretically, this should have worked. This fan has a higher CFM rating as well as a higher static pressure rating. In actual use, this was not the case. In the end, Ive returned to the thin fan. Now Just because this fan didnt meet my particular needs, Im not knocking it too much. If what you need is a smallish fan to quietly move lots of air, this will do the trick nicely.
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Wilford Sipes
> 3 daygood
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Winston Nienow
> 3 dayFar superior product over the cooler master cooler that it replaced. The fan on my cooler master Gemini low profile cpu cooler has stopped working right outside of the warranty. Perfect replacement! The fan is a waaayyy better value, and super quiet!
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Bill S.
> 3 dayI got a great deal on a refurbished HP rp5800 at Micro Center for 120 dollars although the CPU fan it came with was starting to show its age and making a loud whirring noise and a year later a grinding noise. So I knew that the OEM CPU fan was on its way out and decided to replace it with this 92mm 4 pin Noctua fan I have heard many positive things about Noctua and decided to give them a shot. They really do live up to their name and is whisper quiet while also producing more air. Please note that if you decide to replace your OEM CPU in just about any prebuilt make sure that you buy a 4 pin fan and not the 3 pin otherwise it will stay at a very high rpm and also be very noisy.
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Robert Argumaniz
> 3 dayVery quiet good item
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JefferyS
> 3 dayWorks great, bought it as an add-on fan to my Noctua heat sink.
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Sam
Greater than one weekQuiet as usual, but the fan frame is warped, not planar. Had to shim it in order to sit tight on the mounting face. This is what happens when legends are formed: quality goes down. Shame.
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Bob Belansen
> 3 dayI bought this to replace the stock cpu fan in an old dell workstation with an intel xeon. I have it running on full blast all the time and barely hear it. It keeps my cpu temperature under 60 degrees under a 75 watt load. The downside if youre considering using it in a dell computer is the connectors dont match up so you need to buy a dongle (like a smart person would) or use jumper wires (like I do).
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Michael Warning
> 3 daySuper quiet, Noctua has excellent fans.
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Tjisana M. Lewis
> 3 dayUsed in a server build - extremely quiet and worth it!
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 |