As I understand it the goal of "high static pressure" fans is to ensure we have sufficient force pushing air through an obstruction to ensure a reasonable flow rate to support cooling.
I don't follow why you would ever want a "high airflow" fan though? My understanding is the reported flow rate assumes a certain counter-pressure (flow impedance?). If I take that "high airflow" fan and put it in a case, if I violate the assumptions about the impedance the fan will just move less air (and possibly have different noise characteristics).
If I have two fans with the same volumetric flow rate (i.e. a matched CFM), and have the same aperture (120mm, 140mm, 200mm, etc), then the shape of the fan blade is the only element left uncontrolled to set the relative pressure produced by the device. If I'm moving the same amount of air through the same region, I expect the exact same cooling characteristics. Once I've matched the flow rate the only free variable should be noise, right?
- What numerically represents "high" and "low" in the context of static pressure for a PC case fan?
- Does the "high" and "low" designation actually mean anything other than in the context of interpreting if a fan will be nosier/quieter than advertised when used in a low/high (i.e. flipped from designed) pressure location?usps tracking showbox speed test