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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.
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_FAN1
Connector
Default fan
mode
Max.
current
Max.
power
CPU_FAN1
Auto mode
2A
24W
SYS_FAN1
DC mode
1A
12W
BAT1
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
There are gradient points of the fan speed that allow you to adjust
fan speed in relation to CPU temperature.
⚠ ⚠Important Make sure fans are working properly after switching the PWM/ DC mode.
Pin definition of fan connectors
1
PWM Mode pin definition
1
DC Mode pin definition
1
Ground
2
+12V
1
Ground
2
Voltage Control
3
Sense
4
Speed Control Signal
3
Sense
4
NC
20
Overview of Components