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5.3 J8: ATX Power Supply Connector
J8 is a 20-pin ATX power supply connector. Refer to the following
table for the pin out assignments. (Use an ATX power supply with 3.3V
power.)
11
1
Signal Name
3.3V
-12V
Ground
PS-ON
Ground
Ground
Ground
-5V
+5V
+5V
20
10
5.4 J17: CPU Fan Power Connector
J17 is a 3-pin header for the CPU fan power connector. The fan must be a
12V fan.
1 2 3
5.5 USB1: USB Connector
USB1 is the standard USB external connector consisting of two ports.
USB support allows connections of up to 64 plug and play external
peripherals per channel. The following table shows the pin outs of these
ports.
PORT 2
PORT 1
TI6NB Pentium II 440BX ATX Motherboard User's Manual
Chapter 5 Installation
Pin #
Pin #
Signal Name
11
1
3.3V
12
2
3.3V
13
3
Ground
14
4
+5V
15
5
Ground
16
6
+5V
17
7
Ground
18
8
Power good
19
9
5VSB
20
10
+12V
J17 Pin #
Signal Name
1
Rotation
2
+12V
3
Ground
USB1 Pin #
Signal Name
1
Vcc
2
USB-
3
USB+
4
Ground
19
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