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Date:      Thu, 26 Feb 1998 13:01:00 -0500
From:      Ken Hansen <khansen@njcc.com>
To:        Snob Art Genre <benedict@echonyc.com>
Cc:        John Birrell <jb@cimlogic.com.au>, hackers@FreeBSD.ORG
Subject:   Re: 2.2.5 keeps crashing . . . please advise. (fwd)
Message-ID:  <34F5ADDC.1411@njcc.com>
References:  <Pine.GSO.3.96.980226102846.15604B-100000@echonyc.com>

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Not so fast there, I built an Alpha system the other week and the CPU
ran
DARN hot, I asked the vendor and I casually mentioned that it should not
be a problem because "The cover was off the whole time" - he said I
should
never run my system for any length of time with the cover off, because
the
air is not flowing, it is stagnant over the CPU.

I suspect that even though you have a fan next to the CPU, the heat is
not
being pulled away from the processor by the PS fan as it would if the
case
were closed, you simply have the fan blowing air onto the CPU and
hopefully
"pushing" the hot air away.

I would not point my finger at a heat issue right away, but I would not 
dismiss it so quickly either (BTW, after I closed the case the Alpha
system
ran fine for 72 hours straight, with the case open it started to fail
after
about 8 hours or so...

Just my .02 worth,

Ken
khansen@njcc.com


Snob Art Genre wrote:
> 
> On Thu, 26 Feb 1998, John Birrell wrote:
> 
> > I had a similar sort of crash with 2.2.5 trying to update it to current.
> > I thought it was memory too, but reseating that had no effect.
> > Then I noticed that the CPU fan had come unstuck (it doesn't have a clip
> > like it probably should). After putting the fan back, the system has
> > run reliably since. So as a long shot, is there enough air flow to
> > keep the processor "cool"? 8-)
> 
> The processor has a heat sink, and sits right near the front case fan.
> Plus, I've had the case open since I started messing around with the
> SIMMs, so I think there's enough air flow.
> 
> Thanks though.
> 
> > --
> > John Birrell - jb@cimlogic.com.au; jb@netbsd.org; jb@freebsd.org
> > CIMlogic Pty Ltd, GPO Box 117A, Melbourne Vic 3001, Australia +61 418 353 137
> >
> 
>  Ben
> 
> "You have your mind on computers, it seems."
> 
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