Chapter 4: Advanced Motherboard Setup
4-9
4-7 Connector Definitions
Power Connectors
The 24-pin ATX power connector
header (JPW1) provides power to
the motherboard. PJ1 is the 12V DC
power connector that provides alter-
native power for a special enclosure
when the 24-pin ATX power is not
in use. The 4-pin power connector
J6 provides power to onboard HDD
devices.
ATX Power 24-pin Connector
Pin Definitions (JPW1)
Pin# Definition Pin # Definition
13
+3.3V
1
+3.3V
14
NC
2
+3.3V
15
COM
3
COM
16
PS_ON
4
+5V
17
COM
5
COM
18
COM
6
+5V
19
COM
7
COM
20
NC
8
PWR_OK
21
+5V
9
5VSB
22
+5V
10
+12V
23
+5V
11
+12V
24
COM
12
+3.3V
12V DC Power
Pin Definitions (PJ1)
Pin# Definition
1-2
GND
3-4
12V
4-Pin HDD Power
Pin Definitions (J6)
Pin# Definition
1
12V
2-3
GND
4
5V
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