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Installation
2-7
Socket 478
M
Power Supply
The VIA P4MA mainboard requires an ATX power supply for powering the
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: ATXPWR
This connector is for the ATX power supply. To connect to the ATX power
supply, make sure the plugs of the power supply are inserted in the correct
orientation and the pins are properly aligned. Then, push down the plugs
firmly into the connector.
ATX 12V Power Connector: ATX12V
This 12V power connector is used to provide power to the CPU.
PIN SIGNAL
11 3.3V
12 -12V
13 GND
14 PS_ON
15 GND
16 GND
17 GND
18 -5V
19 5V
20 5V
PIN SIGNAL
1 3.3V
2 3.3V
3 GND
45V
5 GND
65V
7 GND
8 PW_OK
9 5V_SB
10 12V
ATXPWR Pin Definition
PIN SIGNAL
1 GND
2 GND
3 12V
4 12V
ATX12V Pin
ATXPWR
AUX12V
1
3
2
4
10
1
20
11