be quiet! Silent Wings 2 140mm Case Fan Review


be quiet! is, not surprisingly I'm sure, a company about removing the burden of noise from power hungry, heat-producing, and noisy components that make up the high performance computers of today.  They brand themselves as a "premium manufacturer," and our first impressions of their Silent Wings 2 fans didn't leave us questioning that.  The Silent Wings 2 promise quality construction and components and thoughtful design to deliver a fucntional case fan that moves plenty of air but is, for all intensive purposes, silent.  And boy, are these a treat for tired ears.


The SilentWings 2 fan family provides the greatest airflow-to-noise ratio and highest reliability on the market. Key to these fans’ unrivalled and uncompromising performance are a unique airflow-optimized fan blade design, custom anti-vibration mounts, and a high-tech fluid dynamic bearing with copper core that greatly reduces noise and imparts super-long life. Through this advanced technology these fans achieve virtually silent operation without sacrificing airflow, and so offer the perfect balance between superior cooling and serenity.


The SilentWings 2 140mm model is the largest fan we make that combines all of the above class-leading features. It provides maximum cooling airflow and operating noise levels down to a virtually silent 15.8 dB(A).


Virtually Silent Operation

SilentWings® 2 fans include a wide array of electronic and mechanical optimizations for superior air flow with very low noise production

  • Unique airflow-optimized fan blade design reduces noise-generating fan turbulence
  • Advanced fluid dynamic bearing providing for greatly reduced operating noise
  • Improved modular vibration damping mounts and rubberized frame help prevent transmission of vibration to computer case and its components
  • Option for direct hard mount when preferred
  • Advanced high quality IC motor controller reduces electrical noise



  • Advanced fluid dynamic bearing (FDB) with industrial grade lubricant eliminates direct contact between rotor and frame, resulting in extremely low noise levels
  • The FDB has a copper core that conducts heat away from the bearing more effectively, enabling super-long fan life of up to 300,000 hours
  • Dynamically balanced fan blades enhance reliability and result in maximum operating silenceGerman product conception, design and quality control




Dimensions (L x W x D), (mm)
140 x 140 x 25
Fan speed @ 12V (rpm) 1000
Air flow @ 12V (cfm, m3/h) 60.4 / 102.6
Air pressure @ 12V (mm H2O) 0.81
Noise level @ 12V (dB(A)) 15.8
Bearing type Fluid Dynamic Bearing
Connector 3-pin
Cable length (mm) 450
Lifespan (h / 25°C) 300,000
Rated voltage DC (V)
Starting voltage DC (V) 4
Operating voltage DC (V) 4-14
Input power (W)




An understated box gives way to be quiet's premium Silent Wings 2 fan with a neat plastic carton.  The two different attach brackets are in a tray that lifts off to reveal the 3-pin to 4-pin Y-connector, a 12V to 7V and 5V adapters for reduced fan speed and lower noise (not sure why you'd need any quieter), as well as 5 rubber mounting push pins and metal screws (YAY for a spare!), and finally 5 silica gel washers for vibration reduction.  A pretty exhaustive inclusion list for a case fan, similar to Noctua's premium fans, and we're happy to see these premium fans arriving with a matching premium-level "payload."  Alright, let's dig in.

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