American Megatrends Atlas III PCI User Manual page 30

Step 5 Attach Cables,
When attaching connectors to the motherboard, make sure to connect the
correct connector end. Most connector wires are color-coded. Match the color
of the wires leaving the switch or LED to the same pin on the connector end.
There may be more than one connector with the same color-coded wires. If so,
follow the wire to the switch or LED. Pin 1 is always indicated on the
motherboard.
J13 CPU Fan A 2-pin berg labeled J13 attaches to the CPU fan. The J13 connector is next to
the CPU socket.
J22 External SMI Connector Attach the 2-wire cable from the external SMI source to J22. J22
is a 2-pin berg.
USB Connectors The motherboard has two 4-pin headers that attach to a USB connector on the
computer chassis. The USB port allows you to attach to a USB hub. The
pinouts are the same for both USB connectors:
24 Atlas PCI-III PCI Pentium ISA Motherboard User's Guide
Continued
Pin Description
1 +12V
2 Ground
Pin Signal Description
1 VCC (Fused 5V)
2 - Data
3 + Data
4 Ground
Cont'd