Cpu And System Fan Connectors - VIA Technologies VB7009 User Manual

2.2.6. CPU and System Fan Connectors

There are two fan connectors on board: one for the CPU and one for the chassis. The fan connector
for the CPU is labeled as "CPUFAN1" and the fan connector for the system is labeled as "SYSFAN1".
The fans provide variable fan speeds controlled by the BIOS. The pinout of the fan connectors is
shown below.
Figure 18 Figure Figure Figure 18: Fan connectors 18 18 : Fan connectors : Fan connectors : Fan connectors
Table Table 14 14: Fan connector pinouts : Fan connector pinouts
Table Table 14 14 : Fan connector pinouts : Fan connector pinouts
CPU fan (CPUFAN1) CPU fan (CPUFAN1) CPU fan (CPUFAN1) CPU fan (CPUFAN1)
Pin Pin Signal Signal
Pin Pin Signal Signal
1 F_IO2 / Fan speed detection
2 F_PWM2 / Fan speed control
3 GND
System fan (SYSFAN1) System fan (SYSFAN1) System fan (SYSFAN1) System fan (SYSFAN1)
Pin Pin Signal Signal
Pin Pin Signal Signal
1 F_IO1 / Fan speed detection
2 F_PWM1 / Fan speed control
3 GND
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CPUFAN1
1
SYSFAN1
1
22