MSI 645 Ultra-C Manual page 31

Note:
1. Always consult the vendor for proper CPU cooling fan.
2. CPU Fan supports the fan control. You can install the PC Alert
utility that will automatically control the CPU Fan speed accord-
ing to the actual CPU temperature.
2-15
Hardware Setup
SENSOR
+12V
GND
CPUFA
SENSOR
+12V
GND
SYSFA