Thunder i7520 / Thunder i75 20 R Chapter 3: Board Installation
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3.1.1 5 - Fan Connector
Pin1: GND
Pin2: +12V
Pin3: Tachometer
Pin4: Fan PWM (Speed) Control
* PWM stands for Pulse Width Modulation
This 4-pin fan connector supports a new standard of fan connector for better fan life.
It has an integrated fan speed control on the fan itself. The first 3 pins of this 4- pin fan
connector are backward compatible with a traditional 3- pin fan connector without PWM fan
speed control. (Pin4 will be unconnected for connecting a 3- pin fan).
There are three 4-pin fan connectors (CPU FAN1, CPUFAN2 and FAN 1) and six 3- pin fan
connectors (FAN2, FAN3, FAN4, FAN5, FAN6 and FAN 7) on the Thunder i7522 S5362 board.
Use these connectors to connect chassis and processor cooling fans to your motherboard.
Cooling fans can keep the system stable and reliable for its product life.
FAN
PWM Control
Tachometer Reading
CPUFAN1
Yes
(ADT7463 Pin24/PWM1)
Yes
(ADT7463 Pin11/TACH1)
CPUFAN2
Yes
(ADT7463 Pin10/PWM2)
Yes
(ADT7463 Pin12/TACH2)
FAN1
Yes
(ADT7463 Pin13/ PWM3)
Yes
(ADT7463 Pin9/TACH3)
FAN2
No
No
FAN3
Yes
(SIO Pin116/FANPWM1)*
Yes
(SIO Pin111/FANIO3)
FAN4
Yes
(SIO Pin116/FANPWM1)*
Yes
(SIO Pin113/FANIO1)
FAN5
No
No
FAN6
No
No
FAN7
Yes
(SIO Pin115/FANPWM2)
Yes
(SIO Pin112/FANIO2)
* FAN3 and FAN4 are shared the same PWM control.