Cpu_Fan1, Pump_Fan1, Sys_Fan1~6: Fan Connectors - MSI MAG H670 TOMAHAWK WIFI DDR4 User Manual

CPU_FAN1, PUMP_FAN1, SYS_FAN1~6: 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.
The auto mode fan connectors can automatically detect PWM and DC mode. However,
you can follow the instruction below to adjust the fan connector to PWM or DC Mode
manually.
CPU_FAN1
SYS_FAN4
SYS_FAN5
Switching fan mode and adjusting fan speed
You can switch between PWM mode and DC mode and adjust fan speed in BIOS >
HARDWARE MONITOR.
Select PWM mode or DC mode
⚠
Important
Make sure fans are working properly after switching the PWM/ DC mode.
Pin definition of fan connectors
1
1 Ground
3 Sense
28
Overview of Components
PUMP_FAN1
SYS_FAN1
SYS_FAN2
SYS_FAN3
SYS_FAN6
There are gradient points of the fan speed that allow you to adjust
fan speed in relation to CPU temperature.
PWM Mode pin definition
2 +12V
4 Speed Control Signal
Default
Connector
fan mode
CPU_FAN1 PWM mode
PUMP_FAN1 PWM mode
SYS_FAN1~6 DC mode
1
1 Ground
3 Sense
Max. Max.
current power
2A 24W
3A 36W
1A 12W
DC Mode pin definition
2 Voltage Control
4 NC