computers don't like heat or dust, so, if you can put the main CPU in a
enclosed rack that stays cool and reasonalbly dust free you should be fine.
keeping it cool is the most important thing. you can buy some static free
compressed air and blow out the dust regularly. i've got a buddy that has
had a server and PC in his garage which is the dirtiest place i've ever seen
and he never has problems.
IMHO keep it as cool and as dust free as you can. the rest is your
I would recommend looking at the via mini-itx boards. You can get one that
will run fanless, though not fast enough to do CAD stuff, going fanless you
have the ability to not use the pc as a dust collector :)
I have a P133 class machine that has been in my shop for 3 years playing MP3s.
It has done fine through all the dust, dirt, Florida humidity and heat along
with a fire and the insuing flood. It was one of the 2 things that emerged
unscathed (the other was a home built CMOS spa controller).
PCs are a lot tougher than people admit. I also have one in my car and my wifes
truck. They both crank up in ungodly heat and run.
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