MSI A320M-A PRO MAX Mode D'emploi page 16

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
Adjusting fan speed
You can adjust fan speed in BIOS > HARDWARE MONITOR.
1
CPU_FAN1
PWM Mode pin definition
1 Ground 2
3 Sense 4
There are gradient points of the fan speed that allow you to
adjust fan speed in relation to CPU temperature.
1
SYS_FAN1
+12V
Speed Control Signal
Overview of Components
15