adapt ATX mobo to 14-pin Compaq PSU

[Jaz]

I want to use a Compaq 14-pin ATX power supply from a Deskpro 4000EN
on a normal 20-pin ATX motherboard (I know this sounds silly, but I
have two other 4000en's running Linux and Solaris, and this 90W PSU is
extremely quiet, so this case/PSU would make i nice home for my
mini-ITX allways-on system, which only needs 50Wor so, and can be
stacked with the others)

So if this isn't a totally rediculous idea, then how would I wire the
14-pin PSU to 20-pin mobo?

PSU System board

1 +3.3Vdc 1 +3.3Vdc
2 +3.3V Sense 2 +3.3Vdc
3 Signal GND 3 Signal GND
4 +5Vdc 4 +5Vdc
5 Signal GND 5 Signal GND
6 +5Vdc 6 +5Vdc
7 Signal GND 7 Signal GND
8 +3.3Vdc 8 PWR-OK
9 -12Vdc 9 +5VSB
10 Fan Off 10 +12Vdc
11 On/STBY 11 +3.3Vdc / 3.3V Sense
12 +5V Aux 12 -12Vdc
13 +3.3V Sense 13 Signal GND
14 +12Vdc 14 PS-ON
15 Signal GND
16 Signal GND
17 Signal GND
18 -5Vdc
19 +5Vdc
20 +5Vdc

Thanks
(Please excuse the 'burp' when replying)

 

[kony]

So if this isn't a totally rediculous idea,

and if it is?

Frankly, if you knew how to do it already it "might" be a reasonable
project, but then again it may not be so simple as it seems.

Low-wattage, small power supplies are dirt-cheap these days. If a fan
is too loud just swap the fan, though it's "possible" to run without a
fan if you have some kind of chassis airflow or are competent enough
around AC votages to keep the power supply cover off.

Here are a few:

Very good value:
http://www.mpja.com/productview.asp?product=15055+PS

Sparkle "ES2853" at bottom of page:
http://www.excess-solutions.com/POWERSUP.HTM

Not sure about the connector on this one:
http://www.allelectronics.com/cgi-bin/category.cgi?category=480&item=PS-180


Or there are several mATX/other at http://www.newegg.com

 

[Jaz]

and if it is?

Frankly, if you knew how to do it already it "might" be a reasonable
project, but then again it may not be so simple as it seems.

Low-wattage, small power supplies are dirt-cheap these days. If a fan
is too loud just swap the fan, though it's "possible" to run without a
fan if you have some kind of chassis airflow or are competent enough
around AC votages to keep the power supply cover off.

Here are a few:

Very good value:
http://www.mpja.com/productview.asp?product=15055+PS

Sparkle "ES2853" at bottom of page:
http://www.excess-solutions.com/POWERSUP.HTM

Not sure about the connector on this one:
http://www.allelectronics.com/cgi-bin/category.cgi?category=480&item=PS-180


Or there are several mATX/other at http://www.newegg.com

Wow, great find! In fact I have spent a good amount of time looking
for fanless mini-ITX project PSU's, but these are cheap enough to
experiment with. Thanks kony!
-jaz-

(Please excuse the 'burp' when replying)

 

[Phrederick]

Probably not too helpful, but try taking a look at:

ftp://ftp.compaq.com/pub/supportinformation/techpubs

Lots of Compaq tech docs... just no index to which are which.

 

[Phrederick]

....actually, take a look at:

ftp://ftp.compaq.com/pub/supportinformation/techpubs/technical_reference_guides/329001-001_rev4_us.pdf

Not the same model PC, but looks like it has a 14pin ATX connector. You
should be able to see if it's a match by comparing what you have to what's
in the POWER SUPPLY section.