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3,263 reviews at Trustpilot.3,263 reviews

Scythe Ultra-Quiet Fans

Scythe have an excellent reputation for producing some of the world best CPU heatsinks, with the Ninja possibly being their most popular. Scythe’s reputation does not stop with their CPU heatsinks. Over the past few years Scythe have also produced some of the quietest and most reliable fans around. Their range is second to none. Sizes start from 40mm all the way up to 120mm.

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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Scythe Kaze Flex 120mm PWM RGB 1200rpm

55 in stock
Kaze Flex 120mm PWM RGB 1200rpm
  • Quiet PC PWM cooling fan
  • Closed Fluid Bearings
  • Eight RGB LEDs
  • 24.9 dB(A) / 1200 RPM / 51.2 CFM
  • MTBF 120,000 hours
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£12.78
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Scythe Kaze Flex 120mm RGB 1200 RPM Quiet Case Fan

56 in stock
Kaze Flex 120mm RGB 1200 RPM Quiet Case Fan
  • Quiet PC cooling fan
  • Closed Fluid Bearings
  • Eight RGB LEDs
  • 24.9 dB(A) / 1200 RPM / 51.2 CFM
  • MTBF 120,000 hours
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£11.45
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Scythe Kaze Flex 120mm PWM RGB 1800 RPM Quiet Case Fan

47 in stock
Kaze Flex 120mm PWM RGB 1800 RPM Quiet Case Fan
  • Quiet PC PWM cooling fan
  • Closed Fluid Bearings
  • Eight RGB LEDs
  • 35.8 dB(A) / 1800 RPM / 79.8 CFM
  • MTBF 120,000 hours
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£11.45
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Scythe Kaze Flex 120mm PWM Case Fan, 1200 RPM

43 in stock
Kaze Flex 120mm PWM Case Fan, 1200 RPM
  • Variable speed fan with 4-pin PWM connector
  • 1200 RPM PWM version for virtually silent performance
  • Integrated anti-vibration rubber corner pads
  • 300 - 1200 RPM, 16.6 - 24.9 dBA, 16.6 - 51.2 CFM
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£9.68
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Scythe Kaze Flex 120mm Case Fan, 2000 RPM

44 in stock
Kaze Flex 120mm Case Fan, 2000 RPM
  • Fixed speed fan with 3-pin fan connector
  • 2000 RPM version for maximum performance
  • Integrated anti-vibration rubber corner pads
  • 2000 RPM, 38.0 dBA, 89.0 CFM
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£8.95
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Scythe Kaze Flex 120mm Case Fan, 1200 RPM

11 in stock
Kaze Flex 120mm Case Fan, 1200 RPM
  • Fixed speed fan with 3-pin fan connector
  • 1200 RPM version for balanced performance
  • Integrated anti-vibration rubber corner pads
  • 1200 RPM, 24.9 dBA, 51.0 CFM
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£8.60
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Scythe Kaze Flex 120mm Case Fan, 800 RPM

22 in stock
Kaze Flex 120mm Case Fan, 800 RPM
  • Fixed speed fan with 3-pin fan connector
  • 800 RPM version for virtually silent performance
  • Integrated anti-vibration rubber corner pads
  • 800 RPM, 14.5 dBA, 43.0 CFM
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£8.60
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FAQ

  • How do I measure fan size?

    The size of fan you need will generally be determined by the size of the fan fitting position in your PC case. The sizes of all the fans on our website are shown as measured along any one of the fan’s four sides, NOT the distance between the fan’s screw holes! Our most popular fan size is 120mm, followed by 80mm. This isn’t really dictated by customer preference, but more by recent designs of PC cases.

    As for the thickness (depth) of the fan, generally 25mm (1 inch) is by far the most common depth, although smaller fans can have shallower depths such as 15mm or even 10mm. All our fans are 25mm thick unless otherwise stated. If you have any questions about which fan you should order, please don’t hesitate to get in touch.

    If you know the distance between the fan mounting screw holes but don’t know what fan size to order, please see the following table. Note that the mounting hole measurements shown below are taken horizontally or vertically between the holes and not diagonally.

    Screw hole spacings and fan sizes

    32mm between screw holes:40mm fan size
    40mm between screw holes:50mm fan size
    50mm between screw holes:60mm fan size
    60mm between screw holes:70mm fan size
    72mm between screw holes:80mm fan size
    83mm between screw holes:92mm fan size
    105mm between screw holes:120mm fan size


  • I received a small cable (resistor) with my fan; what is it for?

    The resistor cable (also called Ultra Low Noise or ULN cable) is designed to allow the fan to run slightly slower for even quieter operation. The benefit in lower running noise is significant. Although the airflow will be reduced slightly, this usually has minimal effect on PC temperature. We would generally recommend using the ULN resistor cable for best results in almost all circumstances.

  • How can I tell which way the air blows through the fan?

    Hold the fan so that the round fan sticker is facing you. You are looking at the rear of the fan. When you plug the fan in, the air will be blowing towards you. If you want a fan to act as an air intake, then the fan sticker will be facing the inside of the case. Some fans also have two small arrows moulded into their plastic housing - one arrow shows the direction of airflow, and the other (at 90°) shows the direction of blade rotation.

  • Is it possible to use a 4-pin PWM fan or CPU cooler with a motherboard which has only 3-pin fan headers on it?

    Electrically, there is no problem doing this - the fourth pin on the fan cable is used purely for PWM control and is not needed in order for the fan to run. So you can plug the 4-pin fan connector onto the 3-pin motherboard fan header, leaving the fourth pin not connected to anything. The fan will potentially run at full speed, so if you would like to reduce the speed of the fan you will need to adjust the fan speed setting in your BIOS or use fan control software such as SpeedFan in Windows.

    The only other problem to consider is that occasionally, components immediately adjacent to the motherboard fan header can get in the way of the larger 4-pin fan connector, physically preventing connection. This problem also occurs if you try to use an in-line fan speed controller such as the one made by Gelid.

    Another avenue to explore is the possibility of using a bay-mounted fan controller. Several models are available now which provide 4-pin fan headers, so this is an easy way to use 4-pin PWM fans in a PC system which has only 3-pin fan headers on its motherboards. When using this method, you may find it necessary to disable any fan warning settings in your motherboard BIOS, since the motherboard may incorrectly believe that its CPU fan has failed when the fan is connected to a fan controller rather than directly to the motherboard itself.

“Good range and prompt delivery”

“Wide range of items in each category with good info on the products which is hard to find elsewhere.

Despatch and delivery always quick.”

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