. The new PH-F200SP blades are angled lower to achieve higher air pressure. The redesigned MVB blades generate better performance and better airflow. It improves the balance of airflow and air pressure when being used as a case fan.The PH-F200SP has a larger base size with a magnetic brushless DC motor to avoid the effects of resonance and for rotational stability.With noise reduction challenges in mind we modified the component for lower actuator noise PCBA for lower electromagnetic noise brushless motor structure for lower operating noise and frame rib for lower wind and vibration noise..