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661M03 Series User Manual
Chapter 2 Installation Instructions
Power Supply
This motherboard uses an ATX power supply. In order to avoid damaging any
devices, make sure that they have been installed properly prior to connecting
the power supply.
20-pin ATX power connector: PWR1
PWR1 is the ATX power supply connector. Make sure that the power supply cable
and pins are properly aligned with the connector on the motherboard. Firmly plug
the power supply cable into the connector and make sure it is secure.
4-pin ATX_12V Power Connector: PWR2
The ATX power supply connects to PWR2 and provides power to the CPU.
Attention
You have to press the power button for more than four seconds if
you change the default “Instant Off” setting to “Delay 4 Sec” from
the “Power Button Override” option in the BIOS Power Manage-
ment Setup.
20-pin ATX power connector
20
10
12V
5VSB
5V
GND 3.3V GND
5V
GND
PWR_OK 3.3V
11
1
5V GND 3.3V GND GND
5V
-5V GND PS-ON -12V
4-pin ATX_12V power connector
12V
GND
12V
43
2
1
GND