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be quiet! SILENT WINGS PRO 4 120mm PWM

  • German Engineering - German Design - German Quality - German Performance
  • Optimized fan blades for the highest performance on radiators and heat sinks
  • Speed switch allows changing maximum PWM speed between medium-speed (up to 1,600 rpm), high-speed (up to 2,500 rpm) and ultra-high-speed (up to 3,000 rpm)
  • Small tip clearance and a fan frame with a funnel-shaped air outlet for extremely high air pressure
  • Virtually inaudible operation at regular speed
  • 6-pole fan motor for less vibration and power consumption
  • Fluid-dynamic bearing enables very smooth operation
  • Individual and easy mounting systems for use as a case fan or with a radiator
  • Super-long life-span of up to 300,000h
  • Valuable sleeved PWM cable and easy to install PWM connector
  • Elegant look with high-grade fan sticker in an all-black design
  • 5-year manufacturer warranty
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Overview
Specs
Reviews (16)
LEGENDARY SILENCE, EPIC PERFORMANCE AND FEATURES

Silent Wings Pro 4 120mm PWM is the most progressive, performant and versatile fan by be quiet!

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SILENT WINGS PRO 4 120mm PWM
  • Optimized fan blades for the highest performance on radiators and heat sinks
  • Speed switch allows changing maximum PWM speed between medium-speed, high-speed and ultra-high-speed (up to 3000 rpm)
  • Small tip clearance and a fan frame with a funnel-shaped air outlet for extremely high air pressure
  • Virtually inaudible operation at regular speed
  • 6-pole fan motor and fluid-dynamic bearing for less vibration and very smooth operations
  • Individual mounting systems for use as a case fan or with a radiator
  • 5-year manufacturer warranty
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ELEGANT LOOK

Equally quiet and performant operation.

Be it in a case, on radiators or heat sinks - Features like the silence-optimized fan blades and the funnel shaped fan frame make Silent Wings Pro 4 140mm PWM a fan that makes no compromises between virtually inaudible operation and high performance.

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OPTIMIZED FOR HIGH-END PERFORMANCE

Silent Wings 4 always makes a good impression.

 The all-black design combined with the high-grade fan sticker makes the fan shine in any system. This makes Silent Wings Pro 4 140mm PWM a high performant and an incredibly good-looking fan.

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6-POLE FAN MOTOR

The key for virtually inaudible operation.

6-pole fan motor with 3 phases for very low power consumption, less vibration and therefore quiet max. operation of 13.6dB(A). Equipped with this state-of-the-art technology the fan is virtually inaudible when operated in mid-speed.

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3 DIFFERENT MOUNTING OPTIONS

Silent Wings Pro 4 140mm PWM has 3 mounting options in the scope of delivery. The pre-installed radiator corners are specially designed for radiators on which the incomparable performance of this high-end fan completely shines. On the other hand, for chassis use, the anti-vibration mounting is the first choice as they reduce vibrations to a minimum. The plastic mountings round up the scope.

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SPEED SWITCH

The speed switch makes switching between medium, high-speed and ultra-high-speed of maximum RPM levels quick and easy. The Silent Wings Pro 4 140mm PWM alters its application with a simple slide to the right. Medium-speed is suitable for any operation that requires regular cooling performance. High-speed lets the fan spin faster, providing more cooling power. Ultra-high-speed ultimately offers enough rpm to cool even the most demanding hardware in high-end PC builds. 

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IMPROVED ON ALL LEVELS

The fan blades are what makes a fan. It is for this reason that the fan blades of Silent Wings Pro 4 140mm PWM have been developed newly from scratch. The new blade arrangement enables a performance second to none for all possible operations. Be it in a case, on radiators or heat sinks. 

Legendary silence, epic performance and features

For the highest performance, optimized fan blades, especially for heat sinks designed radiator corners and a speed switch with 3 selectable speed options, Silent Wings Pro 4 120mm PWM is the most progressive, performant, and versatile fan by be quiet!

Warranty & Returns

Warranty, Returns, And Additional Information

Warranty

  • Limited Warranty period (parts): 3 years
  • Limited Warranty period (labor): 3 years
  • Read full details

Return Policies

    We want to ensure your holiday shopping this year is hassle-free. That’s why we’re automatically extending our return policies on almost every product! For purchases placed between November 1st, 2025 and December 31, 2025 you will have until January 31, 2026 to return your product.

  • Return for refund until: January 31, 2026
  • Return for replacement until: January 31, 2026
  • This item is covered by Newegg.ca's Extended Holiday Return Policy.
  • Read full return policy for details.
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