The mb has two primary differences.  First, ATX
requires a different power supply connection from
the AT machines.  Second, ATX has port connectors
that are fixed in place and stick out the rear end of
the case (rather than have plug-in connectors on the
board).

For the case, it, therefore, must have an ATX power
supply.  The power switch is also somewhat different.
Second, the case must accomodate the back end of
the mb.  Since there are quite a few different back ends,
the best thing to do is to specify what mb you are using
when you buy the case.  Fortunately, there seem to be
two main types of mb's being used, so that many cases
come with templates to accomodate these two main
types.

ATX motherboards are also laid out differently, but this
is not a compatability issue (I don't think so, anyway).

Dean Kukral    [log in to unmask]



-----Original Message-----
From: Delano Lalla <[log in to unmask]>
Date: Monday, January 18, 1999 10:46 PM
Subject: [PCBUILD] AT and ATX difference?


>Can someone tell me the difference between an AT motherboard and an ATX
>motherboard.  Same goes for cases.
>Does it have anything to do with the Keyboard interface?
>
>Help,
>Delano Lalla
>

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