No Colors Needed: Signature cooling performance with an all-black design: a perfect choice for all of the users who want a simple, sleek, and stealthy look. New Blade Design: Revised curve blade design to improve airflow and air pressure. Enhanced Fan Frame: Enhanced frame structure, reducing turbulent flow noise increase efficiency. Sealed Bearing Structure: Two-tier sealing mechanism, preventing dust and lubricating oil leakage while increasing the fan’s operation stability and life span.