申し訳ございませんが、このドキュメントは日本語版では提供されておりません。下記に英語版を掲載いたします。
* The PWM control from the motherboard will have no effect on the fan speed.
In the mainboard BIOS, you can configure the DC mode, follow this guide to adjust your settings. Or refer to your mainboard manual regarding the settings in your BIOS.
Adjust the fan speed by control input voltage accordingly.