Chapter 2: Installation
2-23
2-7 Connecting Cables
This section provides brief descriptions and pin-out definitions for onboard power
connectors. Be sure to use the correct cable for each header or connector.
24-pin PWR
4-pin Auxilliary Power
ATX Power 24-pin Connector
Pin Definitions (JPW1)
Pin# Definition Pin # Definition
13
+3.3V
1
+3.3V
14
-12V
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
Res (NC)
8
PWR_OK
21
+5V
9
5VSB
22
+5V
10
+12V
23
+5V
11
+12V
24
COM
12
+3.3V
24-pin ATX Power Connector (JPW1)
The 24-pin power connector is used
to provide power to the motherboard.
This connector meets the SSI EPS 12V
specification. See the tables on the right
for pin definitions.
A
B
A
(Required)
B
ATX 4-pin CPU Power
Connector
Pin Definitions
Pins Definition
1 and 2
Ground
3 and 4
+12V
4-pin ATX Power Connector (JPW2)
The 4-pin ATX power connector is
used to provide additional power to the
CPU. See the table on the right for pin
definitions.
Note:
Either JPW1 or JPW2 may be
used as the main power input
