. The new PH-F200SP blades are angled lower to achieve higher air pressure. The redesigned MVB blades generate better performance & better airflow. It improves the balance of airflow & 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 & 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 & frame rib for lower wind & vibration noise..