Cpu And System Fan Connectors; Figure 18: Cpu And System Fan Connectors Diagram; Table 14: Cpu And System Fan Connectors Pinouts - 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 pinouts of the fan connectors are shown below.

Figure 18: CPU and System fan connectors diagram

Pin
1
2
3
Pin
1
2
3

Table 14: CPU and System fan connectors pinouts

CPU fan (CPUFAN1)
Signal
F_IO2 / Fan speed detection
F_PWM2 / Fan speed control
GND
System fan (SYSFAN1)
Signal
F_IO1 / Fan speed detection
F_PWM1 / Fan speed control
GND
VIA VB7009 User Manual
17