MSI P31 User Guide - Page 27

CD-In Connector: CD_IN1, Fan Power Connectors: CPUFAN1, SYSFAN1, SYSFAN2

Page 27 highlights

Hardware Setup Fan Power Connectors: CPUFAN1, SYSFAN1, SYSFAN2 The fan power connectors support system cooling fan with +12V. W hen connecting the wire to the connectors, always 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. GND +12V SENSOR Control CPUFAN1 SE NS OR +1 2V GND SYSFAN1 GND +1 2V SE NS OR SYSFAN2 Important 1. Please refer to the recommended CPU fans at processor's official website or consult the vendors for proper CPU cooling fan. 2. Fan cooler set with 3 or 4 pins power connector are both available for CPUFAN1. 3. CPUFAN1 supports fan control. You can setup it in H/W Monitor of BIOS Setup. You can install Dual Core Center utility that will automatically control the CPU fan speed according to the actual CPU temperature. CD-In Connector: CD_IN1 This connector is provided for external audio input. GND L R CD_IN1 2-13

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2-13
Hardware Setup
CD-In Connector: CD_IN1
This connector is provided for external audio input.
Fan Power Connectors: CPUFAN1, SYSFAN1, SYSFAN2
The fan power connectors support system cooling fan with +12V. When connecting
the wire to the connectors, always 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.
SYSFAN1
SENSOR
+12V
GND
Important
1. Please refer to the recommended CPU fans at processor
s official website
or consult the vendors for proper CPU cooling fan.
2. Fan cooler set with 3 or 4 pins power connector are both available for
CPUFAN1.
3.
CPUFAN1 supports fan control. You can setup it in H/W Monitor of BIOS
Setup. You can install
Dual Core Center
utility that will automatically
control the CPU fan speed according to the actual CPU temperature.
CPUFAN1
SENSOR
+12V
GND
Control
SYSFAN2
SENSOR
+12V
GND
CD_IN1
GND
R
L