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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.
You can switch between PWM mode and DC mode and adjust fan speed in
.
Select PWM mode or mode
Important
Make sure fans are working properly after switching the PWM/ DC mode.
There are gradient points of the fan speed that allow you to adjust
fan speed in relation to CPU temperature.
Pin definition of fan connectors
CPU_FAN1
PUMP_FAN1
SYS_FAN1
Default fan
mode
Max.
current
Max.
CPU_FAN1 Auto mode 2A 24W
PUMP_FAN1 PWM mode 3A 36W
SYS_FAN1 DC mode 2A 24W
1
PWM Mode pin definition
1 Ground 2 +12V
3 Sense 4 Speed Control Signal
1
1 Ground 2 Voltage Control
3 Sense 4 NC
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