MSI MS-5153 Manual page 16

CHAPTER 2
2.1-5 CPU Fan Power Connectors: JFAN1 / JFAN2
These connectors supports system cooling fan with +12V. It supports three
pin head connector. When connecting the wire to the connector, always
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 your
mainboard has LM78 chipset on-board, you must use a specially designed
fan with speed sensor to take advantage of LM78's CPU fan control.
+12V
SPEED
GND
JFAN2
For fans with fan speed sensor, every rotation of the fan will send out 2
pulses. LM78 will count and report the fan rotation speed.
Note: 1. JFAN1 is the Chassis Cooling Fan Speed Connector (reserved for
LM78 System Hardware Monitor Option.)
2. Always consult vendor for proper CPU cooling fan.
HARDWARE INSTALLATION
2-9
+12V
SPEED
GND
JFAN1