[Ender-3] Noise comparison between the Creality3D standard board and SKR MINI E3 V2.0

It is a comparison of the noise level of BIGTREETECH SKR MINI E3 V2.0 and Creality3D Ender-3 standard main board Ver1.1.4. SKR MINI E3 V2.0 is equipped with the TMC2209 (Ultra-silent motor driver IC). Replacing it has made the stepper motor quieter. Since the stepping motor is quiet, I'm worried about the sound of the fan. https://yukimi0721.hatenablog.com/entry/2020/07/04/180425