4 install other internal connectors, Power connectors, Pin atx power connector : pwr1 – Foxconn A55M User Manual
Page 20: Pin atx 12 v power connector : pwr2, Pin power pin no. 24, Pwr1, Pwr2, Connect a 4-pin power plug
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2-4 Install other Internal Connectors
Power Connectors
This motherboard uses an ATX power supply. In order not to damage any device, make sure all the
devices have been installed properly before applying the power supply.
24-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 12 V Power Connector : PWR2
The 4-pin ATX 12V power supply connects to PWR2 and provides power to the CPU.
We recommend you using a 24-pin power supply.
If you are using a 20-pin power supply, you need
to align the ATX power connector according to
the picture.
CA
UT
IO
N
!
20-Pin Power
Pin No. 24
Pin #
Definition
Pin #
Definition
1
3.3V
13
3.3V
2
3.3V
14
-12V
3
GND
15
GND
4
+5V
16
PS_ON(Soft On/Off)
5
GND
17
GND
6
+5V
18
GND
7
GND
19
GND
8
Power Good
20
NC
9
+5V SB(Stand by +5V)
21
+5V
10
+12V
22
+5V
11
+12V
23
+5V
12
3.3V
24
GND
PWR1
24
13
12
1
3 1
GND
+12V
4 2
PWR2
Pin #
Definition
1
GND
2
GND
3
+12V
4
+12V
Connect a 4-pin
power plug