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Power to the Mainboard
The standard ATX power supply connector
is a 20-pin connector (see Figure 8)
which can be plugged in correctly by noticing the clip on one side of
the connector lines up with a notch on the socket. Push the connector
down and it will click into place (Figure 102
and Figure 103).
Figure 102: Connecting ATX power to the mainboard Here we are connecting the power before the ribbon cables have been installed.

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Figure 103: ATX power connected to mainboard This is the only power source the Athlon mainboard needs. Pentium 4 mainboards will also use a special 4-pin power connector. To prevent damaging your system, these connectors are designed so they can only be plugged in one way. A little clip will help you orient the power connectors.

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Pentium 4 systems also
make use of a special four-pin connector (Figure 9).
If youre building a Pentium system, connect the four-pin connector.
It also has a clip to help show orientation. If youre building
an Athlon system, you wont need this four-pin power connector.
When in doubt, examine your mainboard
manual to see where power connectors go.
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How to Build Your Own PC (http://www.PCGuide.com/byop/) on PCGuide.com
Version 1.0 - Version Date: May 4, 2005
Adapted with permission from a work created by Charlie Palmer.
PCGuide.com Version © Copyright 2005 Charles M. Kozierok. All Rights Reserved.
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