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Noctua NF-A6x25 PWM, Premium Quiet Fan, 4-Pin (60mm, Brown)

4.8 out of 5 stars 992 ratings

Price: S$22.90
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  • Premium quiet fan, 60x60x25 mm, 12V, 4-pin PWM, max. 3000 RPM, max. 19.3 dB(A), 150,000 h MTTF
  • Award-winning 60x25mm A-series fan with Flow Acceleration Channels and Advanced Acoustic Optimisation frame for superior quiet cooling performance
  • Ideal replacement for noisy or broken 12V 6cm fans in DVRs, NAS, network and storage devices, 3D printers, etc.
  • 4-pin PWM version for automatic speed control via 4-pin PWM fan headers, broad 550-3000rpm speed range (2100rpm max. with supplied Low-Noise Adaptor)
  • Includes anti-vibration mounts, fan screws, Low-Noise Adaptor, extension cable and y-cable for running two PWM fans on the same header

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  • Noctua NF-A6x25 PWM, Premium Quiet Fan, 4-Pin (60mm, Brown)
  • +
  • Noctua NF-A4x20 PWM, Premium Quiet Fan, 4-Pin (40x20mm, Brown)
  • +
  • Noctua NF-A4x10 PWM, Premium Quiet Fan, 4-Pin (40x10mm, Brown)
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a6

Featuring advanced aerodynamic design measures such as Flow Acceleration Channels and Noctua’s AAO frame, the NF-A6x25 is a highly optimised, premium quality quiet fan in 60x25mm size. 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 3000 to 2100rpm. Its superb running smoothness, SSO2 bearing and Noctua’s trusted premium quality make it an elite choice for the highest demands.

pwm flx 5v 5v
NF-A6x25 PWM NF-A6x25 FLX NF-A6x25 5V PWM NF-A6x25 5V
Connector 4-pin PWM 3-pin 4-pin PWM 3-pin
Voltage 12V 12V 5V 5V
RPM Max: 3000 / Min: 550 3000 Max: 3000 / Min: 650 3000
RPM with L.N.A. 2300 2400 - -
RPM with U.L.N.A. - 1600 - -
Acoustical Noise 19,3 dB(A) 19,3 dB(A) 19,3 dB(A) 19,3 dB(A)
Acoustical Noise with L.N.A. 13,7 dB(A 14,5 dB(A) - -
Acoustical Noise with U.L.N.A. - 8,2 dB(A) - -
Size 60x60x25 mm 60x60x25 mm 60x60x25 mm 60x60x25 mm

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4.8 out of 5 stars
4.8 out of 5
992 global ratings

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Top review from Singapore

Reviewed in Singapore on 11 September 2021
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5.0 out of 5 stars Works like a charm to cool my DELL T5810
By Arif Octovian on 11 September 2021
I use two NF-A6x25 PWM on my DELL T5810 to help cool the internal.
I initially use 4 pin to 5 pin adapter and connect the two FAN to the HDD fan header but it turn out the speed is too slow to be useful.

I end up buying SATA power to two 4 pin fan adapter (this will make the fan run at full RPM as it connect only the two power pin @ 12v) so I use the Low noise adapter cable supplied included in the noctua fan to make the fan run at lower RPM instead of full RPM.

My setup is one fan at the back for exhaust and another one in-front of the CPU to push more fresh air into the CPU.

My CPU temperature is 3-5c cooler, for light work (browsing / watching youtube will be 35c-40c) with room temperature of 28c.

The two noctua fan are practically silent and I didn't notice any noise increase by installing them.
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Top reviews from other countries

MR R VENTURA
5.0 out of 5 stars Perfect replacement for my Apple Macintosh Classic II
Reviewed in the United Kingdom on 6 April 2021
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One person found this helpful
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Mr. G. Tomlinson
5.0 out of 5 stars Great fan
Reviewed in the United Kingdom on 6 April 2019
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One person found this helpful
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3D Ben
5.0 out of 5 stars Best airflow for a 6cm silent fan
Reviewed in the United Kingdom on 17 November 2021
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Nasenfrosch
4.0 out of 5 stars Guter Lüfter, aber warum soviel Müll drumherum?
Reviewed in Germany on 25 July 2020
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15 people found this helpful
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David Smith
5.0 out of 5 stars Super Quiet Fans
Reviewed in the United Kingdom on 9 June 2019
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