Performance – Max & Speed Percentage
Max RPM, CFM, Pressure & Power
Neither airflow nor static pressure stands out from the crowd. Only power consumption is low,
10 – 100% Fan Speed Percentage
Since most fan control ICs don’t apply precisely the percentage of RPM speed that you want (e.g., 50% PWM for a 2000 RPM fan should be 1000 RPM), I used to find the fan’s maximum speed and then dial directly the fan speeds that corresponded to 10%, 20%, and so on of its maximum rated speed. I decided to stop doing that. So from now on, in all of my fan evaluations, I will dial the corresponding PWM value in 10% steps to also check how accurate its fan controller is and for my noise results to align with the airflow and static pressure results from the Longwin apparatus where I don’t use RPM but PWM control for all testing.
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Why would the white version have a higher noise normalizing RPM than the black version with the same aerodynamic profile? That is, the white version is significantly quieter than the black version?