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5-8
Connector Definitions
Power Connectors
A 20-pin main power supply connector(JPW1)
and two 8-pin CPU PWR connectors (JPW2/
JPW3) on the motherboard. These power
connectors meet the SSI EPS 12V specifi-
cation. In addition to the 20-pin ATX power
connector, the 12V 8-pin CPU PWR connec-
tors at JPW2/JPW3 must also be connected
to your power supply. See the table on the
right for pin definitions.
Warning: To prevent damage to the power
supply or motherboard, please use a power
supply that contains a 20-pin and two 8-pin
power connectors. Be sure to connect these
connectors to the 20-pin (JPW1) and the two
8-pin (JPW2,JPW3) power connectors on the
motherboard. Failure in doing so will void the
manufacturer warranty on your power supply
and motherboard.
PW_ON Connector
The PW_ON connector is on pins 1 and 2 of
JF1. This header should be connected to the
chassis power button. See the table on the
right for pin definitions.
Reset Connector
The reset connector is located on pins 3 and
4 of JF1 and attaches to the reset switch on
the computer chassis. See the table on the
right for pin definitions.
Chapter 5: Advanced Serverboard Setup
ATX Power 20-pin Connector
Pin Definitions (JPW1)
Pin#
Definition
11
+3.3V
12
-12V
13
COM
14
PS_ON
15
COM
16
COM
17
COM
18
NC
19
+5V
20
+5V
12V 8-pin PWR Connector
Pin Definitions (JPW2/JPW3)
Pins
1 through 4
5 through 8
Required Connection
Pin# Definition
1
2
Pin# Definition
3
4
5-13
Pin #
Definition
1
+3.3V
2
+3.3V
3
COM
4
+5V
5
COM
6
+5V
7
COM
8
PWR_OK
9
5VSB
10
+12V
Definition
Ground
+12V
Power Button
Pin Definitions
(JF1)
PW_ON
Ground
Reset Button
Pin Definitions
(JF1)
Reset
Ground
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