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Date:      Tue, 18 Jul 2000 08:03:08 -0700
From:      "Kevin Oberman" <oberman@es.net>
To:        Chris <kingsqueak@home.com>
Cc:        Richard Stanaford <rsstan@yahoo.com>, freebsd-stable@FreeBSD.ORG
Subject:   Re: Signal 11 on 4-Stable buildworld; bad memory or what? 
Message-ID:  <200007181503.e6IF38U23737@ptavv.es.net>
In-Reply-To: Your message of "Mon, 17 Jul 2000 19:24:41 EDT." <20000717192441.A44452@kingsqueak.org> 

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I, too, have a K6-3/450 and had trouble building 4.0. makeworld would
seg-fault at random places, clearly a HW problem.

At the urging of several on this list, I upgraded my cooling and put a
thermocouple on the chip. It was no where near hot enough to exceed
specs at any point I could get the probe on. So...

I started looking at memory. I had 2 DIMMs, a 64 MB and a 32
MB. Neither has ECC. One was a Micron board that came with the
computer and the other was Compaq board that come with my other system
and became a spare when I increased the memory size on it.

If I removed the Micron board, the situation did not improve at
all. When I pulled the Compaq board, all was well. Of course, cooling
the memory batter often makes it work better, so those opening the
cab and pointing a fan into it or adding extra cooling may well "fix"
a memory problem as well as a CPU problem.

While the CPU might occasionally be the problem, if properly
heat-sinked and ventilated, I suspect that memory is a more common
problem. I saw 128 MB ECC PC133 memory at a very reasonable price at
Fry's last week and I'm tempted to upgrade. I suspect it would
eliminate a lot of random faults and would port to an Athlon when I
upgrade. 

R. Kevin Oberman, Network Engineer
Energy Sciences Network (ESnet)
Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab)
E-mail: oberman@es.net			Phone: +1 510 486-8634

> Date: Mon, 17 Jul 2000 19:24:41 -0400
> From: Chris <kingsqueak@kingsqueak.org>
> Sender: owner-freebsd-stable@FreeBSD.ORG
> 
> I like the AMD's, have a K6-3/450 here with a really heavy Alpha
> heatsink on it and a 27cfm bearing fan.  Even with that fan... it just
> doesn't like make buildworld or building X without the case cover off
> though. Though it's not a small problem... it still performs well for me
> overall.  My older K6/2 200 here can build all day no problem...the new
> ones just got really hot.
> 
> I actually had to give up on fbsd for my work desktop because the
> cheapie fan on the K6/2 450 I have just wouldn't cut it, even with the
> case off and the thing would just plain reboot on any moderate sized
> builds. I just don't have the time at the office to mess with it and my
> workstation is a management station of sorts as well.
> 


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