be quiet! Silent Wings 4 140mm Fan

be quiet! Silent Wings 4 | 140mm PWM Fan

The be quiet! Silent Wings 4 | 140mm PWM Computer case Fan 14 cm Black 1 pc(s) delivers near-silent cooling with professional-grade performance for demanding PC builds. This 140mm fan combines advanced fluid dynamic bearing technology with optimised blade design to provide exceptional airflow while maintaining whisper-quite operation.

Key Specifications

Advanced Fluid Dynamic Bearing Technology

The Silent Wings 4 features a premium Fluid Dynamic Bearing (FDB) that significantly reduces friction and wear compared to standard sleeve bearings. This technology ensures smooth, quiet operation and extends the fan’s lifespan to an impressive 300,000 hours MTBF. The bearing design also minimises vibration, contributing to the fan’s exceptionally low noise profile even at maximum speed.

PWM Control for Intelligent Cooling

Equipped with 4-pin PWM (Pulse Width Modulation) support, this fan automatically adjusts its rotational speed between 0-1100 RPM based on system temperature. This intelligent control system means the fan runs at minimal speed during light loads, producing virtually no noise, then ramps up only when your system demands maximum cooling. The 6-pole motor design ensures precise speed control and efficient power delivery across all operating speeds.

Anti-Vibration Design for Silent Operation

be quiet! has engineered this fan with anti-vibration mounting corners and optimised blade geometry to eliminate common sources of noise. The specially designed fan blades maximise airflow while minimising turbulence, and the rubberised mounting system prevents vibrations from transferring to your PC case. At just 13.6 dB under full load, this fan operates at a level comparable to a quiet library, making it ideal for noise-sensitive environments.

Box Contents

• 1 x be quiet! Silent Wings 4 140mm PWM Fan
• 4 x Screws
• 4 x Anti-vibration mounting clips

Check Before You Buy

• Confirm your case supports 140mm fan mounting
• Verify your motherboard has a 4-pin PWM header available
• Check clearance around the mounting area for the 140mm x 25mm dimensions
• Ensure your system can provide the 12V power requirement

Frequently Asked Questions

Q: Is this fan compatible with all PC cases?

A: This 140mm fan fits standard 140mm mounting points. Check your case specifications before purchasing.

Q: What’s the difference between PWM and voltage control?

A: PWM allows the fan to run at lower minimum speeds and provides more precise control through your motherboard’s fan header.

Q: How does the Fluid Dynamic Bearing compare to other bearing types?

A: FDB technology offers quieter operation, longer lifespan, and better reliability than sleeve or rifle bearings.

Q: Can I use this fan as an intake or exhaust?

A: Yes, the Silent Wings 4 works effectively in both intake and exhaust configurations depending on your cooling setup.

Q: What is the power consumption of this fan?

A: The fan consumes 3.6W at maximum load with a rated current of 0.3A.

The Consultant’s Verdict & Warranty

The be quiet! Silent Wings 4 140mm PWM fan represents an excellent choice for users who prioritise quiet operation without sacrificing cooling performance. Its combination of FDB technology, PWM control, and anti-vibration design makes it particularly suitable for HTPCs, home offices, and high-end gaming systems where noise reduction is essential. Covered by the standard Manufacturer Warranty, this fan delivers professional-grade cooling for demanding applications.