eATX - ATX converter

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Just got a nw motherboard and went to install it, on going to plug in the
ATX power conneector I find it dos not fit. Read the manual to find out
there's a new connector typ eATX or EATX.

So I look on the web and find a converter that I am hoping will do the job.
But it gets me thinking is this connector cable to go from an ATX power
supply to an eATX motherboard or for an old ATX motherboard to work with a
new eAXT power supply. Or will it do both ?

Whats the low down ?


Re: eATX - ATX converter

Aaron Gray wrote:
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Can you provide a web URL for the power supply ?
Can you provide a web URL for the motherboard, or a make and model number ?

Maybe by looking at some pictures and documentation, we can make
sense of it.

If you need pictures to refer to, to describe visually what you're
seeing, this page is good. It has some examples of how you can
mix some of the types together.

In general, adapter cables are not required, nor are they
desired. An adapter cable can degrade regulation accuracy,
because there is no provision to handle the thin 3.3V remote
sense wire properly. And adapter cables will not solve
ampacity problems (i.e. "my connector is burned"), as
all an adapter will do, is move the point where the
burning will occur. So when someone asks for an adapter,
first I need to see proof it is really required, before
I would recommend it.

An example of a place an adapter is required, is for computer
cases where the power supply is down at the bottom of the case,
and the motherboard connector is too far from the supply. Then,
a short adapter cable, provides the necessary cable length to
allow the computer to be assembled.

But in general, slapping in adapter cables all over the
place, is not a good practice.


Re: eATX - ATX converter

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Like this ?

Usually from 20 to 24 pin , or  from old ATX power supply to 24 pin
motherboard if you like.
The 20 pin end is a socket to take the ATX plug and the 24 pin end is a plug
to go into the motherboards socket.

Note of waring, check the maximum wattage of your (obviously older) ATX
power supply.
It may not be capable of running your new motherboard & CPU, particularly if
you are adding a grunty video card and several drives.


Re: eATX - ATX converter

On Thu, 9 Jul 2009 19:29:47 +0100, "Aaron Gray"

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What do you mean doesn't fit?  Using an old PSU with a newer
board having eATX, you simply have some socket contacts that
go unused, it does fit.  That's not a problem providing you
stay within the current the older connector is capable of,
which most people do (but you didn't supply specifics of the
connector or parts you'll use).

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As Paul mentioned, avoid converters whenever you can.  

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You didn't link it, so we can't know, but in general if the
connectors are the right gender it would physically be able
to do either, but electrically the only benefit would be
adapting an 8 pin 12V PSU connector to a 4 pin motherboard
socket... because 8 pins into 4 is a lesser degradation and
may be necessary to make it fit, while 4 pins from PSU into
8 pin connector on the motherboard needs no adapter, in that
case the adapter provides an unnecessary impedance with no
gain unless your PSU cable happened to be too short to reach
the socket on the board.

Always mention specifics, links to products so we can know
exactly what you are trying to make work, or at least
examples of tech trends because even when many are
standardized, there are also some dodgy things done which
can be confusing as they have no purpose beyond marketing
gimmicks to sell an overpriced adapter... a couple
connectors with a few small wires between them should cost
$2 at most, but usually quite a bit more or they gouge on
shipping cost.

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