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be quiet! Silent Wings 4 140mm PWM Highspeed Case fan 140 mm PWM
Case fan
Review be quiet! Silent Wings 4 140mm PWM Highspeed
Buy be quiet! Silent Wings 4 140mm PWM Highspeed

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be quiet! Silent Wings 4 140mm PWM Highspeed

Case fan 140 mm PWM

30 customer reviews
29€95
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In stock
Color:

  • Black

    29€95
    In stock

  • White

    29€95
    In stock
PWM:

  • Yes

  • No

Fan diameter:

  • 120 mm

  • 140 mm

Maximum rotation speed:

  • 1100 RPM

  • 1600 RPM

  • 1900 RPM

  • 2500 RPM

Color:
PWM:
Fan diameter:
Maximum rotation speed:

  • Overview

  • Specifications

  • Customer reviews

Overview

Silent Wings 4: silence and performance without compromise

The be quiet! Silent Wings 4 140 mm PWM High-speed combines all the features of a virtually inaudible fan with those of a high-performance fan. A 6-pole motor and anti-vibration mountings combined with fan blades optimised for maximum airflow make the Silent Wings 4 140 mm PWM Highspeed the ideal choice for the most demanding applications in high-end systems.

Highlights

  • Optimised blades for maximum performance on radiators and heat sinks
  • Reduced gap between frame and blades and funnel-shaped air outlet for extremely high air pressure
  • Virtually inaudible operation at steady speed
  • 6-pole motor to reduce vibration and power consumption
  • Hydrodynamic bearing mechanism (fluid dynamic bearing)
  • Anti-vibration mounting system with push pins for installation as a box fan
  • A conventional screw mounting system is also provided to replace the default mounting option
  • Excellent service life of up to 300,000 hours
Specifications
Select your criteria

General information

Product name

 be quiet! Silent Wings 4 140mm PWM Highspeed

Brand

 be quiet!

Model

 BL097

Technical specifications

Use

 Case

Color

 Black

Luminous

 No

Connector(s)

 4-pin Female

Reverse (inverted blades)

 No

PWM

 Yes

Cooling type

 Active (fansink)

Fan diameter

 140 mm

Max sound level

 29.3 dB

Maximum rotation speed

 1900 RPM

Max airflow

 78.4 CFM

Pressure

 2.36 mm/H2O

Weight

 220 g

Use

 Gaming
Office

Bundle

 No

Warranties

Commercial warranty
Seller 2 years

Legal warranty
See terms & conditions

Safety Information

Responsible person

 Listan GmbH

Postal address

 Wilhelm-Bergner-Str. 11C 21509 Glinde Allemagne

Electronic Address
Click here

See all be quiet! products

See be quiet! Case fan section

Product referenced on 5 Jul 2022

Customer reviews
Global rating
10/10
based on 30 reviews Editorial and moderation guide
  • 83%
    25 reviews
  • 13%
    4 reviews
  • 0%
  • 3%
    1 review
  • 0%
  • by renaudD
    Posted on 14 May 2026
    Bought on 16 Apr 2026 from LDLC
    Number of reviews: 1 Average rating: 10

    ordered urgently because the first one received was defective (I am still waiting for help from L...

    Top fan, I came across a defective unit (quickly replaced), but if I count the 140 and 120 fans I bought, I have 9 in total and no issues generally. It works, it doesn't make too much noise.

    My disappointment comes from LDLC's response regarding my problem. That's all.

    Model: be quiet! Silent Wings 4 120mm PWM Highspeed
    Review automatically translated
  • by Azria
    Posted on 2 Feb 2026
    Bought on 20 Jan 2026 from LDLC
    Number of reviews: 1 Average rating: 10

    Perfect!

    Delighted with the purchase. The fans are completely silent during everyday use, and even when running resource-intensive games, they remain relatively quiet. Bonus points for be quiet!'s consistently impeccable aesthetics—it's understated and beautiful.

    Model: be quiet! Silent Wings 4 140mm PWM
    Review automatically translated
  • by Krill
    Posted on 21 Jan 2026
    Bought on 13 Aug 2024 from LDLC
    Number of reviews: 11 Average rating: 6

    Not so quiet, even in low profile

    They're not that quiet, and taking them apart is a pain... so yeah, the anti-vibration is cool, but the system for detaching them means I have to take apart the top of my 802 case to remove the thing, which is a real pain... There's no room for the clip system if all the cases are full, and I'm afraid I'll have to break them.

    Don't even think about it... you'd have to be a troll or an intern.

    Be Quiet, I love you guys, but please make an effort.

    Model: be quiet! Silent Wings 4 140mm PWM Highspeed
    Review automatically translated
  • by OlivierL
    Posted on 17 Dec 2025
    Bought on 16 Nov 2025 from LDLC
    Number of reviews: 8 Average rating: 10

    Silence

    For me (shared office), the silence of the beast is paramount.
    This series of fans achieves that goal. I have three on my case, two on top and one on the back.
    During normal office/internet use, it's silent :-), and when under load, it purrs gently, nothing like the old mill that was my laptop.
    Everyone's happy.

    Model: be quiet! Silent Wings 4 120mm PWM
    Review automatically translated
  • by Yannick C
    Posted on 14 Oct 2025
    Bought on 14 Sep 2025 from LDLC
    Number of reviews: 8 Average rating: 10

    Perfect

    Bought to install a replacement PC, everything works perfectly without any noise and the equipment heats up very little.
    Perfect

    Model: be quiet! Silent Wings 4 140mm PWM
    Review automatically translated
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