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Date:      Sun, 13 Jul 1997 19:03:54 -0700 (PDT)
From:      Howard Lew <hlew@www2.shoppersnet.com>
To:        "Jordan K. Hubbard" <jkh@time.cdrom.com>
Cc:        jwm@CSUA.Berkeley.EDU, FreeBSD-hardware@FreeBSD.ORG, root@meeko.eecs.Berkeley.EDU
Subject:   Re: AMD K6 
Message-ID:  <Pine.BSF.3.91.970713184434.13282A-100000@www2.shoppersnet.com>
In-Reply-To: <16138.868840695@time.cdrom.com>

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On Sun, 13 Jul 1997, Jordan K. Hubbard wrote:

> > 	I ma currently test driving an AMD K6/200 in a
> > FIC PA-2005 motherboard and I am getting a lot of crashes.
> > (actually it looks like a reset, no cores, no console messages
> > just a spontaneous reboot). I am wondering if anyone has seen
> > the K6 do similar things.  The vendor says "The K6 does support
> > UNIX", but I am inclined to believe that he doesn't have a clue.
> > I am thinking I will return the K6 and get a Cyrix M2, any thoughts?
> 
> We've been totally unable to get the K6 to work reliably, nor have any
> of the folks we've been talking to had much luck - the symptoms are
> basically the same in each case, signal 11s all over the place and
> make world failures.  What's weirder is that it will often work just
> fine for days or weeks, the initial make world tests going fine, and
> then it will just stop, no make world making it through from that
> point on.  I'd never seen a CPU fail due to heat death, but it sure
> seems like the only explanation here.  What's more worrisome is that
> the other 4 testers had exactly the same thing happen.
> 
> Anyway, FreeBSD, Inc. now owns an expensive piece of chip jewelry from
> AMD since our 30 day return period also elapsed during testing. :(
> 

Hmmm... that's odd, I have not seen that problem here.  Knock on wood.
But then we use heatsink grease as recommended by AMD.

Motherboards tested to work fine:

FreeTech F63T, F76, F79*
PC Chips M537A, M537B*

* = with switching VRM

Are you guys using it on a Dual Voltage motherboard?  at 2.9V Core and 
3.3V I/O?
 
With the current that it draws, a switching voltage regulator is highly
recommended.  Motherboards that use a standard linear voltage regulator
motherboard can overheat and blow the voltage regulator and damage the
motherboard and/or cpu.  




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