Cpu_Fan1, Pump_Fan1, Sys_Fan1~4: Fan Connectors; Jaud1: Front Audio Connector - MSI X399 GAMING PRO CARBON AC Quick Start Manual

CPU_FAN1, PUMP_FAN1, SYS_FAN1~4: 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.
When you plug a 3-pin (Non-PWM) fan to a fan connector in PWM mode, the fan speed
will always maintain at 100%, which might create a lot of noise. You can follow the
instruction below to adjust the fan connector to PWM or DC Mode.
Important
You can switch between PWM mode and DC mode and adjust fan speed in BIOS >
y
HARDWARE MONITOR.
Make sure fans are working properly after switching the PWM/ DC mode.
y
Pin definition of fan connectors
PWM Mode pin definition
1 Ground
3 Sense

JAUD1: Front Audio Connector

This connector allows you to connect audio jacks on the front panel.
28
Overview of Components
Default PWM Mode fan connectors
CPU_FAN1
Default DC Mode fan connectors
SYS_FAN1/ SYS_FAN2/ SYS_FAN3/ SYS_FAN4
2 +12V
4 Speed Control Signal
1
3
5
7
9
1
PUMP_FAN1
1
DC Mode pin definition
1 Ground
3 Sense
2
1
MIC L
MIC R
Head Phone R
SENSE_SEND
Head Phone L
1
2 Voltage Control
4 NC
10
9
2 Ground
4 NC
6 MIC Detection
8 No Pin
10 Head Phone Detection