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Overview of Components
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.
PWM Mode pin definition
1 Ground 2 +12V
3 Sense 4 Speed Control Signal
DC Mode pin definition
1 Ground 2 Voltage Control
3 Sense 4 NC
Important
You can switch between PWM mode and DC mode and adjust fan speed in BIOS
> HARDWARE MONITOR. And please make sure fans are working properly after
switching the PWM/ DC mode.
1
CPU_FAN1/ PUMP _FAN1
Pin definition of fan connectors
SYS_FAN1~4
1
Auto-detection Mode fan connectors
JTBT1: Thunderbolt Add-on Card Connector
This connector allows you to connect the add-on Thunderbolt I/O card.
1
1 FORCE_PWR 2 SCI_EVENT
3 SLP_S3# 4 SLP_S5#
5 Ground
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