Biostar A55MLC2 Owner's Manual | Page 12
Biostar Motherboards Owner's Manual - A55MLC2.
Motherboard Manual
10
2.4 CONNECTORS AND SLOTS
ATXPWR2: ATX Power Source Connector
This connector will provide +12V to CPU power circuit.
Pin Assignment
1 +12V
2 +12V
3 Ground
4 Ground
ATXPWR1: ATX Power Source Connector
This connector allows user to connect 24-pin power connector on the ATX
power supply.
Pin Assignment
Pin
Assignment
13 +3.3V
1
+3.3V
14 -12V
2
+3.3V
15 Ground
3
Ground
16 PS_ON
4
+5V
17 Ground
5
Ground
18 Ground
6
+5V
19 Ground
7
Ground
20 NC
8
PW_OK
21 +5V
9
Standby
Voltage+5V
22 +5V
10
+12V
23 +5V
11
+12V
24 Ground
12
+3.3V
Note: Before you power on the system, please make sure that both ATXPWR1 and
ATXPWR2 connectors have been plugged-in.
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