Noctua nf f12 pwm 120mm focused flow pwm cooling fan by teaming up eleven stator guide vanes with a specially conceived seven blade impeller the nf f12s focused flow system creates outstanding static pressure and focuses the airflow for superior performance on heatsinks and radiators at the same time a wide range of advanced aerodynamic design measures second generation sso bearings and noctuas new custom designed pwm ic for fully automatic control guarantee astounding quietness of ope