Performance – Max & Speed Percentage
Max RPM, CFM, Pressure & Power
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The maximum speed is sky-high, offering top performance.
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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And again, the Alphacool Core 4000RPM 120mm is not only 3 times cheaper than the Noctua NF-A12x25 G2 but also better as a radiator fan.