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5-8
Connector Defi nitions
ATX Power Connector
The primary ATX power supply con-
nector (J1B1) meets the SSI (Super-
set ATX) 24-pin specifi cation. Refer to
the table on the right for the pin defi ni-
tions of the ATX 24-pin power connec-
tor. This connection supplies power to
the chipset, fans and memory.
Note: You must also connect the 8-
pin (JPW1) and 4-pin (JPW2) power
connectors to your power supply (see
below).
Processor Power Connector
In addition to the primary ATX power
connector (above), the 12v, 8-pin
processor power connector at JPW1
must also be connected to your power
supply.
This connection supplies
power to the CPUs. See the table on
the right for pin defi nitions.
Auxiliary Power Connector
The 4-pin auxiliary power connector
at JPW2 must also be connected to
your power supply. This connection
supplies extra power that may be
needed for high loads. See the table
on the right for pin defi nitions.
Power LED
The Power LED connection is located
on pins 15 and 16 of JF1. Refer to the
table on the right for pin defi nitions.
Chapter 5: Advanced Serverboard Setup
ATX Power 24-pin Connector
Pin Defi nitions (J1B1)
Pin#
Defi nition
13
+3.3V
14
-12V
15
COM
16
PS_ON
17
COM
18
COM
19
COM
20
Res (NC)
21
+5V
22
+5V
23
+5V
24
COM
Processor Power
Connector
Pin Defi nitions (JPW1)
Pins
1 through 4
5 through 8
Required Connection
Auxiliary Power
Connector
Pin Defi nitions (JPW2)
Pins
1 & 2
3 & 4
Required Connection
Power LED
Pin Defi nitions (JF1)
Pin#
15
16
5-13
Pin #
Defi nition
1
+3.3V
2
+3.3V
3
COM
4
+5V
5
COM
6
+5V
7
COM
8
PWR_OK
9
5VSB
10
+12V
11
+12V
12
+3.3V
Defi nition
Ground
+12V
Defi nition
Ground
+12V
Defi nition
Vcc
Control
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