The actual usable power of a fan is not deducible from the result of "maximum static pressure". The result "maximum static pressure" is measured at the point where the counter pressure of the volume flow is reduced to zero.

The actual power is the power stability of the fan, in other words the amount of air that gets transported against mechanical resistance, or "what comes out". Radiators or CPU coolers are good examples: they effectively and dramatically reduce the transported air volume. An NB-eLoop fan is by far more pressure stable than a traditional axial fan, while having the same volume or number of revolutions. The loop rotor of the NB-eLoop also transports more air with mechanical resistance and with that achieves a higher cooling performance.