How to change the usage of the external fan to 50% when starting the system?

[tianyi2]

Hi,
The usage of the external fan is 100% in the beginning of the starting of the system, and the noise is very big.
And when the system is stable,the usage is 50% and the noise is acceptable.
How to change the usage of the external fan to 50% when starting the system?
Thanks

[DaveYYY]

Hi,

the device goes through many steps when starting up (like MB1, MB2, UEFI…), and the fan is controlled by different drivers in each stage. You’d need to first confirm at which stage of booting process is the fan very noisy (usually with UART log), and then we can modify the code to control it.

Not sure if it’s clear enough, but if that sounds too hard for you, then I would suggest just leave it as it is now…