MSI MS-7255 manual Power Supply, ATX 24-Pin Power Connector JPWR2, ATX 12V Power Connector JPWR1

MS-7255 Mainboard

Power Supply

ATX 24-Pin Power Connector: JPWR2

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 sup- ply 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.

JPWR2 Pin Definition

pin 13

pin 12

24

12

		PIN	SIGNAL	PIN	SIGNAL
		1	+3.3V	13	+3.3V
		2	+3.3V	14	-12V
JPWR2		3	GND	15	GND
		4	+5V	16	PS-ON#
	13	5	GND	17	GND
	1	6	+5V	18	GND
		7	GND	19	GND
		8	PWROK	20	Res
		9	5VSB	21	+5V
		10	+12V	22	+5V
		11	+12V	23	+5V
		12	NC	24	GND

ATX 12V Power Connector: JPWR1

This 12V power connector is used to provide power to the CPU.

JPWR1

1	3
2	4

JPWR1 Pin Definition

PIN SIGNAL

1GND

2GND

312V

412V

Important

1.Maker sure that all the connectors are connected to proper ATX power sup- plies 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.

2-8