Fan speed control in the M1S BIOS can reduce noise or improve cooling, depending on the workload and installation environment.
Open the BIOS
- Power off the system.
- Press the power button and repeatedly press Del while the MAIYUNDA logo appears.
- Go to Advanced > Hardware Monitor > Smart Fan Function.
The BIOS provides separate CPU Smart Fan Mode and System Smart Fan Mode settings.
- Manual Mode: adjust the fan PWM value directly.
- Automatic Mode: define temperature and fan-speed points for a custom curve.
- Full on Mode: run the fan at full speed.
For most installations, Automatic Mode gives the best balance. Use Manual Mode when a fixed PWM value is required, and Full on Mode only when maximum cooling is the priority. Press F4, select Yes, and confirm to save.
How do I connect the system fan in the M1S model? It’s not physically there, and neither is the connector. And the picture in this article shows a working system fan (do not mislead customers)