Long Service Life The Arctic F14 PWM PST features a Fluid Dynamic Bearing that is complete with an oil capsule to prevent leakage, bringing you the quiet performance of a sleeve bearing but with a much longer service life. Perfect Fan Regulation with PWM PWM Technology allows compatible motherboards to precisely control fans to only run at the speeds necessary to meet demand. Bringing quiet yet efficient cooling performance. Made in Germany The Arctic F14 PWM PST fan is well known for its high airflow at comfortable noise levels, further improvements have been made to the motor and controller, German engineers created the F14 PWM PST fan work at lower speed when performance is not needed. Often motherboards don't provide PWM signals below 40 % and thus make PCs unnecessary loud - not so with the F14 PWM PST. PWM Sharing Technology (PST) Usually to improve the cooling efficiency of your computer you will fit several case fans that work in parallel. Problems can arise if they are out of sync, thats where PST technology comes in, by assuring all fans listen to the same single control signal assuring all fans spin up/down as deemed necessary by user needs. Innovative Design Breeds Quiet, Efficient Ventilation Improvements to the fan blades has improved airflow and facilitates a highly efficient ventilation whilst still focusing on minimising noise levels whilst still delivering outstanding cooling performance.