MSI 915P COMBO-FR User Guide - Page 22

Power Supply - 2 cpu support

Page 22 highlights

Hardware Setup Power Supply The mainboard supports ATX power supply for the power system. Before inserting the power supply connector, always make sure that all components are installed properly to ensure that no damage will be caused. ATX 24-Pin Power Connector: ATX1 This connector allows you to connect an ATX 24-pin power supply. To connect the ATX 24-pin power supply, make sure the plug of the power supply is inserted in the proper orientation and the pins are pin 13 aligned. Then push down the power supply firmly into the connector. You may use the 20-pin ATX power supply power supply as you like. If you'd like to use the 20-pin ATX power supply, please plug your power supply along with pin 1 & pin 13 (refer to the image at the right hand). There is also a foolproof design on pin 11, 12, 23 & 24 to avoid wrong installation. pin 12 Pin Definition 13 1 PIN SIGNAL PIN SIGNAL ATX1 24 1 +3.3V 13 +3.3V 2 +3.3V 14 -12V 3 GND 15 GND 4 +5V 16 PS-ON# 5 GND 17 GND 6 +5V 18 GND 7 GND 19 GND 8 PWR OK 20 Res 9 5VSB 21 +5V 10 +12V 22 +5V 12 11 +12V 12 NC 23 +5V 24 GND ATX 12V Power Connector: JPW1 This 12V power connector is used to provide power to the CPU. JPW1 42 31 JPW1 Pin Definition PIN SIGNAL 1 GND 2 GND 3 12V 4 12V MSI Reminds You... 1. These two connectors connect to the ATX power supply and have to work together to ensure stable operation of the mainboard. 2. Power supply of 350 watts (and above) is highly recommended for system stability. 3. ATX 12V power connection should be greater than 18A. 2-9

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2-9
Hardware Setup
Power Supply
The mainboard supports ATX power supply for the power system. Before
inserting the power supply connector, always make sure that all components are
installed properly to ensure that no damage will be caused.
PIN
SIGNAL
13
+3.3V
14
-12V
15
GND
16
PS-ON#
17
GND
18
GND
19
GND
20
Res
21
+5V
22
+5V
23
+5V
24
GND
PIN
SIGNAL
1
+3.3V
2
+3.3V
3
GND
4
+5V
5
GND
6
+5V
7
GND
8
PWR OK
9
5VSB
10
+12V
11
+12V
12
NC
Pin Definition
PIN
SIGNAL
1
GND
2
GND
3
12V
4
12V
JPW1 Pin Definition
ATX 12V Power Connector: JPW1
This 12V power connector is used to provide power to the CPU.
ATX 24-Pin Power Connector: ATX1
This connector allows you to connect an ATX 24-pin power supply. To
connect the ATX 24-pin power supply, make sure the plug of the
power supply is inserted in the proper orientation and the pins are
aligned. Then push down the power supply firmly into the connector.
You may use the 20-pin ATX power supply power supply
as you like. If you’d like to use the 20-pin ATX power supply, please
plug your power supply along with pin 1 & pin 13 (refer to the image
at the right hand). There is also a foolproof design on pin 11, 12, 23
& 24 to avoid wrong installation.
ATX1
1
12
24
13
pin 12
pin 13
JPW1
1
3
4
2
MSI Reminds You...
1. These two connectors connect to the ATX power supply and have to
work together to ensure stable operation of the mainboard.
2. Power supply of 350 watts (and above) is highly recommended for
system stability.
3. ATX 12V power connection should be greater than 18A.