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Noctua NF-B9 PWM 92mm Case Fan

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  • 92mm
  • 1600 RPM +/-10%, 1300 RPM +/-10% (w/ L.N.A), 300 RPM +/-10% (Min. Rotational Speed (PWM)) 64.3 m3/h (standard), 52.6 m3/h (w/L.N.A.)
  • SSO-Bearing (Self-stabilising oil-presure bearing)
  • 17.6 dBA, 13.1 dBA (w/L.N.A.)

  • Overview
  • Specs
  • Warranty & Returns
  • Reviews

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, the NF-B9 PWM is a proven premium choice for the highest demands.

  • newegg Bevelled Blade Tips 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.
  • newegg 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.
  • newegg Custom designed PWM IC with SCD Supporting fully automatic PWM speed control, the NF-B9 PWM 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.
  • newegg Low-Noise Adaptor The NF-B9 PWM is supplied with a Low-Noise Adaptor (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.
  • newegg Extensive Cabling Options 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 you to connect a second NF-B9 fan to the same PWM fan header for automatic control.
  • newegg SSO-Bearing Combining the proven concept of hydrodynamic bearing with an additional magnet that supports the self-stabilisation of the rotor axis, Noctua’s time-tested SSO-Bearing technology has become synonymous with supremely quiet operation and exceptional long-term stability.

Learn more about the Noctua NF-B9 PWM

Warranty, Returns, And Additional Information
  • Warranty
  • Limited Warranty period (parts): 6 years
  • Limited Warranty period (labor): 6 years
  • Read full details
  • Return Policies
    • Return for refund within: 30 days
    • Return for replacement within: 30 days
  • This item is covered by's Standard Return Policy.
Ownership: more than 1 year
Verified Owner
5/ 5
Lives up to expectations 12/5/2014 1:16:01 PM

Pros: Bought for a silent mATX build. It preforms at a whisper, and exhausts air very well. So I bought a few 120mm later on.

Cons: The rubber grommets were insanely hard to put in. I'm not joking, I don't know if I was doing it wrong or what but it took like two hours.

Overall Review: Whatever size, I think it's safe to say Noctua fans are always welcome in my builds.

Did you find this review helpful?
Ownership: 1 day to 1 week
Verified Owner
5/ 5
10/12/2013 12:14:42 PM

Pros: NewEgg is the best service always get the right items packaged good,decent prices and fast delivery.Noctua makes the quietest fans.You do not hear this fan at all.Would recommend this fan to anybody looking for quietest fan for PC case.

Cons: Noctua's can be pricey.Color could be better then brown,but i do not see it unless i open case for me.

1 out of 1 people found this review helpful. Did you?
Ownership: more than 1 year
Verified Owner
5/ 5
NOCTUA NF-B9 CaseFan 4/20/2013 6:59:48 PM

Pros: These are the most under-rated fans available. Once I found out how quiet they are (17.9dbm), how reliable, relatively inexpensive, and the 6 year warranty, done! I am on my 3rd desktop PC and the first thing I am doing is replacing the stock case fans. Especially the stupid X-MAS tree red light back case fan!

Cons: NONE

Overall Review: Do yourself a favor and replace those junk stock fans with quality.

4 out of 4 people found this review helpful. Did you?
Ownership: less than 1 day
Verified Owner
5/ 5
Outstanding fan 4/12/2013 5:58:44 AM

Pros: Very Quiet

Cons: The screws provided aren't long enough to mount my fan to my radiator. It has to go from one end of the fan out the opposite end and then to my radiator so I'm thinking I may need to get 30mm long screws.

Overall Review: This fan was well worth the money. It's so quiet and it keeps my water cooled CPU idling at 35c ish in my Shuttle SZ77R5

3 out of 3 people found this review helpful. Did you?
Ownership: 1 day to 1 week
Verified Owner
5/ 5
Never been this happy over a fan 1/24/2013 9:00:52 PM

Pros: Powerful
Silent (no exaggeration)

Cons: Packaging is too elaborate. Advice to Noctua company is to tone down on the fancy packaging because you make an excellent product. That way you can cut your prices a little and sell more fans. Other than that GREAT FANS!

5 out of 5 people found this review helpful. Did you?
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