MSI PRO B660M-P Manuel D'utilisation page 20

CPU_FAN1, SYS_FAN1: Fan Connectors
Fan connectors can be classified as PWM (Pulse Width Modulation) Mode or DC Mode.
PWM Mode fan connectors provide constant 12V output and adjust fan speed with
speed control signal. DC Mode fan connectors control fan speed by changing voltage.
1
Fan connector specifications
Connector
CPU_FAN1
SYS_FAN1
⚠
Important
You can adjust fan speed in BIOS > HARDWARE MONITOR.
PWM Mode pin definition
Pin
1
3
DC Mode pin definition
Pin
1
3
Default fan mode
PWM mode
DC mode
19
Signal Name Pin
Ground 2
Sense 4 Speed Control Signal
Signal Name Pin
Ground 2
Sense 4
Max. current
2A
1A
Signal Name
+12V
Signal Name
Voltage Control
NC
Max. power
24W
12W