VIA Technologies NAB-7400, User Manual, Page: 16 / 76

Chapter 2
8
CPU Fan and System Fan: CPUFAN and SYSFAN
The CPUFAN (CPU fan) and SYSFAN (system fan) run on +12V and maintain
system cooling. When connecting the wire to the connectors, always be
aware that the red wire is the Positive and should be connected to the +12V.
The black wire is Ground and should always be connected to GND.
FAN_MCM is a switch that is used by high-quality fans to monitor the system
temperature and will automatically adjust according to the environment.
CPUFAN
Pin Signal
1 FAN_MCM
2 +12V
3 GND
SYSFAN
Pin Signal
1 FAN Speed detect
2 FAN_Control
3 GND
1
SYSFAN
1
CPUFAN