MSI B250M PRO-VD — обзор разъемов для вентиляторов: PWM и DC режимы [14/150]

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Overview of Components

CPU_FAN1, SYS_FAN1: Fan Connectors

Fan connectors can be classified as PWM (Pulse Width Modulation) Mode and 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. When you plug a 3-pin (Non-PWM) fan to a PWM Mode fan connector, the fan

speed will be always maintained at 100%, and that could be noisy.

CPU_FAN1

1 Ground 2 +12V

3 Sense 4

Speed Control

Signal

SYS_FAN1

1 Ground 2

Voltage

Control

3 Sense 4 NC

Default PWM Mode fan connector Default DC Mode fan connector

In Hardware Monitor menu, you can set the temperature levels and the

corresponding fan speed levels.

Switching fan mode and adjusting fan speed

You can switch between PWM mode and DC mode, and adjust fan speed in BIOS >

Advanced > Hardware Monitor.

You can select the PWM mode or DC mode for fan.

Important

Make sure fans are working properly after switching the PWM/ DC mode.