AIR RIPPER blade design comparison:

AIR RIPPER blade design delivers max air pressure and massive airflow

AIR RIPPER blade design decreases turbulent flow for better air pressure and quieter (acoustic)
performance

PWM fan driver IC with SSC technology:

Supporting fully automatic PWM speed control,
the PIRANHA uses custom design PWM IC that integrates Soft Switching Commutation (SSC) technology

Hydro Dynamic Bearing (HDB) structure advantage:

HDB uses a dynamic pressure field and an anti-leak seal to maintain constant bearing lubrication, extends fan life up to 50,000 hours and lowers fan noise