Chapter 5: Advanced Motherboard Setup
5-9
5-7 Connector Definitions
Power Connectors
The 24-pin ATX power connector
header (JPW1) provides power to
the motherboard. The 12V DC power
connector (JPV1) provides alternative
power for a special enclosure when
the 24-pin ATX power is not in use.
The 4-pin power connector (JPH1)
provides power to onboard HDD
devices.
Note
: Do not use the 8-pin DC power
at JPV1 when the 24-pin ATX Power
at JPW1 is connected to the power
supply. Do not plug in both JPV1 and
JPW1 at the same time.
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
4-Pin HDD Power
Pin Definitions (JPH1)
Pin# Definition
1
12V
2-3
GND
4
5V
1
4
1
4
5
8
8-pin DC Power
Pin Definitions (JPV1)
Pin# Definition
1-4
GND
5-8
12V
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