Be quiet silentwings fans stand for advanced technology virtually inaudible operation and superior cooling the third generation of this amazing series offers unrivaled and uncompromising performance with a broad range of meticulous optimizations they feature a smooth running 6 pole motor an advanced fluid dynamic bearing a unique airflow optimized fan blade design and a fan frame with funnel shaped air inlets the silentwings 3 140 mm high speed model combines all of the above great featur