Be quiet shadow wings sw1 120mm high speed case fan the silentwings 2 fan family provides the greatest airflow to noise ratio and highest reliability on the market key to these fansrsquo 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 op