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Chapter 4: Motherboard Connections
4.2 Power Connections
ATX Power Supply Connector
The 24-pin power supply connector (JPWR1) meets the ATX SSI EPS 12V specification.
You must also connect the 8-pin 12V DC power connectors (JPV1/JPV2/JPV3) to the power
distribution board (PDB) to provide adequate power to your system.
Important:
To provide adequate power supply to the motherboard, be sure to connect
the 24-pin ATX PWR and 8-pin PWR connectors to the power distribution board (PDB).
Failure to do so may void the manufacturer warranty on your PDB and motherboard.
ATX Power 24-pin Connector
Pin Definitions
Pin#
Definition
Pin#
Definition
13
+3.3V
1
+3.3V
14
NC
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
Res (NC)
8
PWR_OK
21
+5V
9
5VSB
22
+5V
10
+12V
23
+5V
11
+12V
24
Ground
12
+3.3V
12V 8-pin Power
Pin Definitions
Pin#
Definition
1 - 4 Ground
5 - 8 +12V