Power Supply; Atx 20-Pin Power Connector: Conn1; Atx 12V Power Connector: Jpw1 - MSI 661FM Series User Manual

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 20-Pin Power Connector: CONN1

This connector allows you to connect to an ATX power supply. To
connect to the ATX 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.
10
1
CONN1

ATX 12V Power Connector: JPW1

This 12V power connector is used to provide power to the CPU.
4
3
JPW1
MSI Reminds You...
Power supply of 300 (and up) watt is highly recommended for
system stability.

Power Supply

CONN1 Pin Definition
20
PIN
1
2
3
4
5
6
7
11
8
9
10
JPW1 Pin Definition
2
PIN
1
1
2
3
4
Hardware Setup
SIGNAL PIN SIGNAL
3.3V 1 1 3.3V
3.3V 12 -12V
GND 13 GND
5V 14 PS_ON
GND 15 GND
5V 16 GND
GND 17 GND
PW_OK 18 -5V
5V_SB 19 5V
20 5V
12V
SIGNAL
GND
GND
12V
12V
2-9