Intel SG-81 - Manual (Page 13)

Hardware Setup 2-3
2.3. Connectors, Headers, and Switches
All the connectors, headers and switches mentioned here are depending on your
system configuration. Some features you may (or may not) have to connect or to
configure depending on the peripherals you have connected.
WARNING: Always power off the computer and unplug the AC power cord before
adding or removing any peripheral or component. Failing to so may cause severe
damage to your system board and/or peripherals. Plug in the AC power cord only after
you have carefully checked everything.
2.3.1. ATX Power Connectors (ATX_POWER, ATX12V)
This connector provides the connection to ATX12V power supply.
User’s Manual