So I have a Cooler Master Hyper 212 RGB black. And I don't like the fan's RGB, plus I could use another fan slapped on it as exhaust. And I have iCUE SP140 case fans so I thought I'd get a PWM iCUE fan. But all of Corsair's PWM fans have really low airflow rating. Does anyone know why? Does that mean it'll be worse for cooling than the SP140 which has a much higher CFM rating?