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Date:      Wed, 04 Mar 1998 13:11:36 -0800
From:      Mike Smith <mike@smith.net.au>
To:        Joao Carlos Mendes Luis <jonny@coppe.ufrj.br>
Cc:        hardware@FreeBSD.ORG
Subject:   Re: TX Chipset and more than 64M Ram 
Message-ID:  <199803042111.NAA22320@dingo.cdrom.com>
In-Reply-To: Your message of "Wed, 04 Mar 1998 17:57:53 -0300." <199803042057.RAA09986@gaia.coppe.ufrj.br> 

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> #define quoting(Mike Smith)
> // > Hi,
> // > 
> // >   What kind of problem could I expect from FreeBSD if I run a TX
> // > chipset motherboard with 128M RAM ?
> // 
> // Your performance will suck.
> // 
> // >  This chipset can only cache
> // > 64M.  Anything other than performance ?  Is it possible to force
> // > FreeBSD to use the low 64M preferentially ?
> // 
> // Take the top 64M out.
> 
> Isn't this worse ?

Well, that depends.  It forces you to think of the machine as having 
64M, which is sensible, as opposed to having 128M.

> // Seriously, it's going to cost you less to replace the board with one
> // wearing an HX chipset than the time that the TX board will waste you.
> 
> The problem is that the original HX board for this server is failing.
> I'm trying to buy an PII FX board, but until that I needed something
> with memory.  Swapping would be worst that having some more wait
> states in memory, would not ?
>
> My worries are more with memory coerence, or some strange effect,
> other than performance only.

Ah.  You should have said that you wanted to use it as a stopgap.  The 
TX board will work "correctly", it's just that, depending on what 
you're doing, your performance may not be acceptable.

-- 
\\  Sometimes you're ahead,       \\  Mike Smith
\\  sometimes you're behind.      \\  mike@smith.net.au
\\  The race is long, and in the  \\  msmith@freebsd.org
\\  end it's only with yourself.  \\  msmith@cdrom.com



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