Biostar P31-A7 Setup Manual page 15

JATXPWR2: ATX Power Source Connector
This connector allows user to connect 24-pin power connector on the ATX
power supply.
Pin Assignment
13 +3.3V
14 -12V
15 Ground
16 PS_ON
17 Ground
18 Ground
19 Ground
20 NC
21 +5V
22 +5V
23 +5V
24 Ground
JATXPWR1: ATX Power Source Connector
By connecting this connector, it will provide +12V to CPU power circuit.
1
13
12
24
Pin Assignment
1 +3.3V
2 +3.3V
3 Ground
4 +5V
5 Ground
6 +5V
7 Ground
8 PW_OK
9 Standby Voltage+5V
10 +12V
11 +12V
12 +3.3V
3 2
Pin
4 1
1
2
3
4
P31-A7
Assignment
+12V
+12V
Ground
Ground
13