Installation
2-7
Power Supply
The VIA P4MA PRO 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
4
5V
5
GND
6
5V
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
Socket 478
M
