BE QUIET Silent Wings Pro 4 140mm PWM Case Fan

The Silent Wings Pro 4 140mm PWM delivers legendary quietness without sacrificing cooling power. With optimized fan blades, three selectable speed modes, and a 6-pole motor designed for minimal vibration, this is the case fan that actually runs silent while keeping your system cool.

Engineered for Real-World Cooling

• Three-speed switch lets you dial in performance—medium, high, or ultra-high up to 2400 rpm—to match your exact needs
• Optimized blade geometry and funnel-shaped air outlet generate exceptional air pressure on radiators and heatsinks
• Virtually inaudible at regular speeds thanks to fluid-dynamic bearing and low-vibration motor design
• 300,000-hour lifespan means years of reliable operation in any case or radiator setup

Pick this up if you're building a quiet PC, upgrading your cooling without noise, or replacing a fan that's wearing out. Works as a standalone case fan or integrated into your radiator loop.