Chapter 2: Installation
2-7
2-6 Connecting
Cables
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 JPW2 power connectors to
your power supply (see below).
Required Connection
ATX Power 24-pin Connector
Pin Defi nitions (J1B1)
Pin# Defi nition Pin # Defi nition
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
Auxiliary 1 Power
Connector
In addition to the primary ATX power
connector (above), the 8-pin proces-
sor power connector at JPW1 must
also be connected to your power
supply. See the table on the right for
pin defi nitions.
Auxiliary 1 Power
Connector
Pin Defi nitions (JPW1)
Pins Defi nition
1 through 4
Ground
5 through 8
+12V
Auxiliary 2 Power
Connector
The 8-pin processor power connector
at JPW2 must also be connected to
your power supply. See the table on
the right for pin defi nitions.
Required Connection
Auxiliary 2 Power
Connector
Pin Defi nitions (JPW2)
Pins Defi nition
1 & 2
Ground
3 & 4
+12V
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.
Power LED
Pin Defi nitions (JF1)
Pin# Defi nition
15
Vcc
16
Control
