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Date:      Tue, 27 Mar 2001 11:40:20 -0500
From:      "Simon" <simon@optinet.com>
To:        "Mike Nowlin" <mike@argos.org>, "Olivier Nicole" <on@cs.ait.ac.th>
Cc:        "freebsd-hardware@freebsd.org" <freebsd-hardware@freebsd.org>
Subject:   Re: Server MB suggestions?
Message-ID:  <20010327163635.6AEF437B719@hub.freebsd.org>
In-Reply-To: <20010327022010.D23590@argos.org>

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Well, first, all my servers have dual PIII CPU, if that matters. Second, i have a 4U rackmount chassis with 1x 12CM in 
front ( on the side) blowing in, 2x 8CM blowing out in the back and of course PS fan also blowing out. The CPU fans 
(retail intel, btw) are running too. My CPU temps go as high as CPU1 43C CPU2 48C . Can you guys provide readings of 
your CPU temps in such boxes as mine so I could compare them. My current temps CPU1/2: 38C/41.5C

Thanks,
Simon

On Tue, 27 Mar 2001 02:20:10 -0500, Mike Nowlin wrote:

>> As a rule, do put AS MANY extra fan in a PC box as possible.
>
>Agreed, but it's important to make sure you have the right balance of fans
>blowing in vs. blowing out.  Most PC chassis have pretty poor "non-fanned"
>venting, and it's almost ALWAYS in the wrong spot.  People tend to install
>fans so they blow out (it's quieter), but having too many blowing out can
>actually help things heat up, as the fans end up doing extra work trying to
>suck air in from vents that don't exist. =20
>
>In my opinion, you want to try to have a little more pressure blowing in
>than blowing out - this makes the whole thing a little louder, but forces
>more air to move around inside the case (cooling things), and helps a lot in
>keeping the dust factor down.  Plus, it lets you decide WHERE the air is
>coming in from, resulting in a lot fewer crap-clogged venting inlets.
>
>(I have several cases here that I've cut an extra 3" round hole in to add
>high-volume inward-blowing fans.  A bit louder than normal, but the insides
>of these machines are really clean (I smoke), and the case temps are just
>slightly above room temperature.)
>
>mike
>




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