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Old 02-22-2011, 04:11 PM   #1 (permalink)
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Default Noctua NF-P14 FLX Case Fan

Noctua NF-P14 FLX Case Fan
By: Dan Durland


After reviewing the Noctua NF-S12B FLX case fan Noctua asked me to evaluate the NF-P14 FLX case fan. Besides being a larger fan, the NF-P14 FLX also sports a unique blade design employing Vortex-Control Notches.
  • 140mm Impeller with Vortex Control Notches
    Thanks to its psycho-acoustically optimised nine blade impeller with staggered Vortex-Control Notches, the NF-P14 combines superb quietness with exceptional airflow and static pressure.
  • Metal Reinforcements
    Both the impeller hub and the bearing shell of the NF-P14 are metal reinforced in order to achieve ultimate manufacturing precision, high durability and vibration-free running.
  • Round frame with 120mm mounting holes
    Using a round frame with the same hole-spacing as common 120mm fans and producing more airflow due to its larger diameter, the NF-P14 is a perfect upgrade for 120mm CPU or case fans. Thanks to the supplied adaptors, the NF-P14 also fits common 140mm mounting holes.
  • 3 speed settings for full flexibility
    Providing 1200, 900 and 750 rpm speed settings via the supplied Low-Noise and Ultra-Low-Noise Adapters, the NF-P14 FLX (Flexibility) can be fine-tuned for superior airflow or maximum quietness.
  • Smooth Commutation Drive 2
    The latest version of Noctua’s advanced SCD drive system ensures superb running smoothness by eliminating torque variations and switching noises.
  • SSO-Bearing
    Noctua’s time-tested SSO-Bearing technology has become synonymous with supremely quiet operation and exceptional long-term stability.

  • Size - 140x140x25 mm
  • Bearing - SSO-Bearing
  • Blade Geometry - NF-P14 Blade Design with VCN
  • Rotational Speed - 1200 RPM (+/- 10%)
  • Rotational Speed with L.N.A. - 900 RPM (+/- 10%)
  • Rotational Speed with U.L.N.A. - 750 RPM (+/- 10%)
  • Airflow - 110.3 m3/h
  • Airflow with L.N.A. - 83.7 m3/h
  • Airflow with U.L.N.A. - 71.2 m3/h
  • Acoustical Noise - 19.6 dBA
  • Acoustical Noise with L.N.A. - 13.2 dBA
  • Acoustical Noise with U.L.N.A. - 10.1 dBA
  • Static Pressure - 1.29 mm H20
  • Static Pressure with L.N.A. - 0.77 mm H20
  • Static Pressure with U.L.N.A. - 0.53 mm H20
  • Input Power - 1.2 W
  • Input Current - 0.1 A
  • Voltage Range - 12 V
  • MTBF - >150,000 h
  • Warranty - 6 years
  • Scope of Delivery
    Ultra-Low-Noise Adapter (U.L.N.A.)
    Low-Noise Adapter (L.N.A.)
    Adapters for 140mm mounting
    4 Vibration Compensators
    3:4-pin Adapter
    4 Fan Screws


The NF-P14 FLX case fan is packaged in what appears to be a regular box. But the curious shopper will find a flap that opens like a book, which contains a few design diagrams, plus Noctua's own test results.

Inside the box we find the fan and all of the accessories in a preformed plastic compartmentalized container.

Image Gallery

Here we have the accessories:
  • Ultra-Low-Noise Adapter (U.L.N.A.) - Blue Connector
  • Low-Noise Adapter (L.N.A.) - Black Connector
  • (4) - Fan Screws
  • (4) - 140mm Mounting Adapters
  • (4) - Vibration Compensators
  • 3:4 pin Adapter

In our next pictures we see the front or intake side of the NF-P14 FLX and a close-up shows shows the Vortex Control Notches plus one of the 140mm Mounting Adapters.

Once again we have the front or intake side of the NF-P14 FLX plus I have all (4) 140mm Mounting Adapters in place.

In our last two pictures we can see the rear or exhaust side of the NF-P14 FLX. The close-up provides a better view of the Vortex Control Notches.


I'll be testing the NF-P14 FLX fan using the same method I used with the NF-S12B FLX fan. Acoustical Noise levels will be verified using the dBA meter built into my Mastech Digital Multimeter. And I'll use my La Crosse Technology EA-3010U Anemometer to take a wind speed measurement in km/h. Once I have the km/h reading I can plug that number into a flow rate calculator and determine the airflow in (m3/h) or (cfm). Noctua has also listed a Static Pressure value in (mm H20) which is virtually impossible to test with my limited resources.

  • 1200 RPM (+/- 10%)
    7.2 km/h =65.2 cfm or 110.8 m3/h
    20.1 dBA
  • 900 RPM (+/- 10%)
    5.5 km/h = 49.8 cfm or 84.6 m3/h
    13.9 dBA
  • 750 RPM (+/- 10%)
    4.6 km/h = 41.7 cfm or 70.8 m3/h
    10.5 dBA

Similar to the other Noctua fans I've used and tested the NF-P14 FLX delivers results that are very similar to the specifications listed and well within the (+/- 10%) RPM range.

  • 120mm or 140mm Mounting Options
  • Very Quiet
  • Excellent Airflow
  • Vibration Compensators
  • 6 year Warranty

  • Color
  • Expensive ($25-$30 US)


Once again Noctua has delivered a solid product that matches its listed specifications. While it is expensive and the color is rather dull the performance is as advertised. Leaving room for future improvements, like a combination of Noctua's Vortex Control Notches and their Bevelled Blade Tips, I'm awarding the NF-P14 FLX a 4.5 out of 5 star rating.

I would like to thank Noctua for allowing Tech-Forums to evaluate this product.


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Old 02-22-2011, 09:48 PM   #2 (permalink)
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Default Re: Noctua NF-P14 FLX Case Fan

Well, all my Noctua fans are that same color, Slay. Have 3 of 'em. Different models.

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Old 02-23-2011, 01:06 AM   #3 (permalink)
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Default Re: Noctua NF-P14 FLX Case Fan

Yeah Slay always puts Colour as a con with Noctua's stuff , I'm not that big a fan of the colour either but it doesn't really make that much difference as to how well it cools lol so no biggie IMO
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Old 02-23-2011, 07:09 AM   #4 (permalink)
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Default Re: Noctua NF-P14 FLX Case Fan

There's really isn't much you can complain about with a Noctua product other than it's drab color. Maybe if I mention it enough they'll start offering different colors
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