MSI MS-6555 Manual page 22

Chapter 2
Fan Power Connectors: CPU_FAN/PWR_FAN/SYS_FAN
The CPU_FAN (processor fan), PWR_FAN (power supply fan) &
SYS_FAN (system fan) support system cooling fan with +12V. It supports
three-pin head connector. When connecting the wire to the connectors, al-
ways take note that the red wire is the positive and should be connected to the
+12V, the black wire is Ground and should be connected to GND. If the
mainboard has a System Hardware Monitor chipset on-board, you must use a
specially designed fan with speed sensor to take advantage of the CPU fan
control.
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.
SENSOR
+12V
GND
CPU_FAN
2-16
SENSOR
+12V
GND
PWR_FAN
SENSOR
+12V
GND
SYS_FAN