Installation
2-7
Power Supply
ATX 20-Pin Power Connector: JWR1
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 power
supply firmly into
the connector. The
power connector
supports an
instant
power on
function,
which means that
system will boot up
immediately when
the power supply
connector is in-
serted on the mainboard.
The VIA P4XB-RA and VIA P4XB-SA mainboards require 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 12V Power Connector: JPW1
This 12V power connector is used to provide power to the CPU.
PIN
SIGNAL
1
GND
2
GND
3
12V
4
12V
JPW1 Pin Definition
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
JWR1 Pin Definition
JPW1
1
3
2
4
JWR1
10
1
20
11