The fans were individually tested and the results below are averaged with a standard deviation calculated.įirst up, I wanted to map out the RPM response curves to see if there was a significant difference between the fans controlled via PWM vs DC voltage control before measuring noise and airflow through the radiator. Fan noise was measured in an anechoic chamber of size 5′ x 8′ with ambient noise level ~19 dBA and a sound probe held 6″ away to measure the sound volume in dBA accordingly. Linear airflow was measured using an Extech 45158 Thermo-Anemometer 6″ away from the fan such that it measured the airflow in feet per minute through the radiator.
Testing was done with the fan mounted one at a time on a single Swiftech MCR120QP radiator, with the fans controlled using a dedicated fan controller (Aquacomputer Aquaero 6 XT) in PWM or power (DC voltage) mode depending on the fan used.
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