MSI 945GCM7 User Guide - Page 23
Power Supply
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Hardware Setup Power Supply 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 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). Pin Definition 12 ATX1 1 24 PIN SIGNAL PIN SIGNAL 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 PW R OK 20 Res 9 5VSB 21 +5V 10 +12V 22 +5V 13 11 +12V 12 +3.3V 23 +5V 24 GND ATX 12V Power Connector: JPW1 This 12V power connector is used to provide power to the CPU. JPW1 42 31 Pin Definition PIN SIGNAL 1 GND 2 GND 3 12V 4 12V pin 13 pin 12 Important 1. Make sure that all the connectors are connected to proper ATX power supplies 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