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CPU_FAN1, PUMP_FAN1, SYS_FAN1~3: 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
> HARDWARE MONITOR. And please make sure fans are working properly after
switching the PWM/ DC mode.
Pin definition of fan connectors
PWM Mode pin definition
1
Ground
3
Sense
JTPM1: TPM Module Connector
This connector is for TPM (Trusted Platform Module). Please refer to the TPM security
platform manual for more details and usages.
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Overview of Components
Auto-detection Mode fan connectors
2
+12V
4
Speed Control Signal
1
3
5
7
9
11
13
1
CPU_FAN1/ PUMP _FAN1
1
SYS_FAN1~3
DC Mode pin definition
1
Ground
3
Sense
2
1
LPC Clock
LPC Reset
LPC address & data pin0
LPC address & data pin1
LPC address & data pin2
LPC address & data pin3
LPC Frame
2
Voltage Control
4
NC
14
13
2
3V Standby power
4
3.3V Power
6
Serial IRQ
8
5V Power
10
No Pin
12
Ground
14
Ground
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