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Site updated: 19.11.17

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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-A4x20 FLX 40mm x 20mm 3-pin Fan

NF-A4x20 FLX 40mm x 20mm 3-pin Fan

Price: £11.63

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

Noctua NF-A4x20 5V PWM 40mm x 20mm 4-pin PWM Fan

NF-A4x20 5V PWM 40mm x 20mm 4-pin PWM Fan

Price: £11.63

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

Noctua NF-A4x20 5V 40mm x 20mm 3-pin Fan

NF-A4x20 5V 40mm x 20mm 3-pin Fan

Price: £11.63

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

Noctua NF-A4X10 5V 40mm Quiet Cooling Fan

NF-A4X10 5V 40mm 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 propitiatory cooling
  56 in stock
 

Noctua NF-A4x20 PWM 40mm x 20mm 4-pin PWM Fan

NF-A4x20 PWM 40mm x 20mm 4-pin PWM Fan

Price: £10.72

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

Noctua NF-A4x10 FLX 40mm x 10mm Low Noise Fan

NF-A4x10 FLX 40mm x 10mm Low Noise Fan

Price: £9.55

  • 40 x 10mm quiet PC cooling fan
  • Noise level from 12.9 dB(A)
  • Feature packed
  • Perfect for propitiatory cooling
  211 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
  100 in stock
 

Scythe Mini Kaze, 40mm x 10mm Quiet Cooling Fan

Mini Kaze, 40mm x 10mm Quiet Cooling Fan

Price: £5.10

  • 40 x 10mm quiet PC cooling fan
  • Noise level 14.0 dB(A)
  • 2-pin and 3-pin connectors
  • Great value
  • Perfect for Chipset/VGA Cooling
  111 in stock
 

Gelid Solutions Silent 4, 40mm Quiet Case Fan

Silent 4, 40mm Quiet Case Fan

Price: £4.74

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

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Brawby Grange
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Malton
YO17 6PZ
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