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Thank you very much, great shop! (12th April 2019 via Trustpilot)

Ultra-Quiet 40mm Fans


For a long time customers have asked us to stock a quiet 40mm fan, but no matter how hard we searched, we could not find one that we considered quiet enough. The problem with fans as small as 40mm is that the fan has to spin fairly quickly in order to provide any decent amount of airflow, and of course with speed comes noise. However, we are now delighted to say that we have a few products which we can thoroughly recommend for any customer who needs to replace a noisy 40mm fan in their PC.

It must be said that if you are thinking of replacing a noisy fan on your video card, we would urge you not to simply replace the noisy fan, but instead get rid of the fan completely and install a passive or low-noise product designed specifically for the job. Check out our Graphics Card Coolers page!

To convert airflow in cubic feet per minute (CFM) to cubic metres per hour (m³/h), multiply the CFM figure by 1.7.

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Noctua NF-A4X10 PWM 5V 5000RPM 40x10mm Quiet Cooling Fan

NF-A4X10 PWM 5V 5000RPM 40x10mm Quiet Cooling Fan

Price: £11.63

  • 40 x 10mm 5-volt quiet PWM PC cooling fan
  • Noise level 19.6 dB(A
  • Feature packed, includes USB power adapter
  • Perfect for proprietary cooling
  45 in stock
 

Noctua NF-A4x20 FLX 12V 5000RPM 40x20mm Quiet Cooling Fan

NF-A4x20 FLX 12V 5000RPM 40x20mm Quiet Cooling Fan

Price: £11.63

  • 40 x 20mm quiet PC cooling fan
  • Three speed settings for full flexibility
  • Feature packed
  • Perfect for proprietary cooling
  • From 5.5 CFM, 14.9 dBA at 5000 RPM
  50 in stock
 

Noctua NF-A4x20 5V 5000RPM 40x20mm Quiet Cooling Fan

NF-A4x20 5V 5000RPM 40x20mm Quiet Cooling Fan

Price: £11.63

  • 40 x 20mm quiet PC cooling fan, 5V version
  • Feature packed
  • Perfect for proprietary cooling
  • From 5.5 CFM, 14.9 dBA at 5000 RPM
  36 in stock
 

Noctua NF-A4x20 PWM 5V 5000RPM 40x20mm Quiet Cooling Fan

NF-A4x20 PWM 5V 5000RPM 40x20mm Quiet Cooling Fan

Price: £11.63

  • 40 x 20mm quiet PC cooling fan, 5V version
  • Supports fully automatic PWM speed control
  • Feature packed
  • Perfect for proprietary cooling
  • From 5.5 CFM, 14.9 dBA at 5000 RPM
  47 in stock
 

Noctua NF-A4X10 5V 4500RPM 40x10mm Quiet Cooling Fan

NF-A4X10 5V 4500RPM 40x10mm Quiet Cooling Fan

Price: £11.63

  • Special 5V edition
  • 40 x 10mm quiet PC cooling fan
  • Noise level from 17.9 dB(A)
  • Feature packed
  • Perfect for proprietary cooling
  98 in stock
 

Noctua NF-A4x10 PWM 12V 5000RPM 40x10mm Quiet Cooling Fan

NF-A4x10 PWM 12V 5000RPM 40x10mm Quiet Cooling Fan

Price: £11.63

  • 40 x 10mm quiet PWM PC cooling fan
  • Noise level from 12.9 dB(A)
  • Feature packed
  • Perfect for proprietary cooling
  22 in stock
 

Noctua NF-A4x20 PWM 12V 5000RPM 40x20mm Quiet Cooling Fan

NF-A4x20 PWM 12V 5000RPM 40x20mm Quiet Cooling Fan

Price: £10.72

  • 40 x 20mm quiet PC cooling fan
  • Supports fully automatic PWM speed control
  • Feature packed
  • Perfect for proprietary cooling
  • From 5.5 CFM, 14.9 dBA at 5000 RPM
  Only 2 left in stock, 160 more due tomorrow
 

Noctua NF-A4x10 FLX 12V 4500RPM 40x10mm Quiet Cooling Fan

NF-A4x10 FLX 12V 4500RPM 40x10mm Quiet Cooling Fan

Price: £9.55

  • 40 x 10mm quiet PC cooling fan
  • Noise level from 12.9 dB(A)
  • Feature packed
  • Perfect for proprietary cooling
  120 in stock
 

Scythe Mini Kaze Ultra, 40mm x 20mm Quiet Cooling Fan

Mini Kaze Ultra, 40mm x 20mm Quiet Cooling Fan

Price: £5.95

  • 40 x 20mm quiet PC cooling fan
  • Noise level 19.6 dB(A)
  • 2-pin and 3-pin connectors
  • Great value
  • Perfect for Chipset/VGA Cooling
  15 in stock
 

Gelid Solutions Silent 4, 40mm Quiet Case Fan

Silent 4, 40mm Quiet Case Fan

Price: £4.71

  • Silent Operation
  • Optimised Fan Blades
  • High Airflow and High Static Pressure
  • Long Lifetime
  577 in stock
 

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