Cpu_Fan1, Sys_Fan1: Fan Connectors - MSI A320M-A PRO M2 Mode D'emploi

CPU_FAN1, SYS_FAN1: Fan Connectors

PWM Mode fan connectors provide constant 12V output and adjust fan speed with
speed control signal. When you plug a 3-pin (Non-PWM) fan to a fan connector in
PWM mode, the fan speed will always maintain at 100%, which might create a lot of
noise.
Default PWM Mode fan connector
⚠
Important
You can adjust fan speed in BIOS > Advanced > Hardware Monitor.
1
CPU_FAN1
PWM Mode pin definition
1 Ground
3 Sense
1
SYS_FAN1
2 +12V
4 Speed Control Signal
Overview of Components
15