MSI P55A User Guide - Page 26

Power Supply

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Hardware Setup Power Supply ATX 24-pin Power Connector: JPWR1 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 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. 1.+23.+3.33.G4V.3.r+5Vo.5uG6Vn.r7+do.5uG8Vn.rP9do.Wu51nV0R1d.S1+O1B.1+K2211.V+3213.V+4.133.-5V.113.2G6V1V.rP7o1.SuG81-n.rO9Gdo2.NurG0o2n#.ruR1do2n.eu+2ds2n5.+3dV2.5+4V5.GVround ATX 8-pin CPU Power Connector: JPWR2 This connector provides 12V power output to the CPUs. 1.G2.rG3o.urG4on.urdGonurdonudnd 5.+61.+721.V+821.V+21V2V Important • Make sure that all the connectors are connected to proper ATX power supplies to ensure stable operation of the mainboard. • Power supply of 400 watts (and above) is highly recommended for system stability. 2-10

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2-10
Hardware Setup
Power Supply
ATX 24-pin Power Connector: JPWR1
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 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.
13.+3.3V
1.+3.3V
14.-12V
2.+3.3V
15.Ground
3.Ground
16.PS-ON#
4.+5V
17.Ground
5.Ground
18.Ground
6.+5V
19.Ground
7.Ground
22.+5V
10.+12V
20.Res
8.PWR OK
23.+5V
11.+12V
21.+5V
9.5VSB
24.Ground
12.+3.3V
ATX 8-pin CPU Power Connector: JPWR2
This connector provides 12V power output to the CPUs.
7.+12V
3.
Ground
5.+12V
1.
Ground
8.+12V
4.Ground
6.+12V
2.Ground
Important
Make sure that all the connectors are connected to proper ATX power supplies to
ensure stable operation of the mainboard.
Power supply of 400 watts (and above) is highly recommended for system stability.
•
•