Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!att!mtuxo!lzfme!jwi
From: jwi@lzfme.att.com (Jim Winer @ AT&T, Middletown, NJ)
Newsgroups: comp.sys.ibm.pc
Subject: Re: 486/25 Power Platform for PS/2 70-A21
Summary: Garbage in, garbage out
Keywords: Intel 80486, PS/2 70, AIX, cost
Message-ID: <1485@lzfme.att.com>
Date: 12 Jul 89 19:32:34 GMT
References: <19000@gatech.edu>
Distribution: usa
Organization: AT&T, Lincroft NJ
Lines: 41

> Ken Seefried III writes:
>
> What kind of real-world performace will you gain from a 486/25 over a
> 386/25 (marketing rubbish claims 80% on 'buisiness applications' 
> (whatever they are) and 4 times better on 'compute intensive applications' 
> (whatever they are))
> 
> If it delivers what they claim, might actually be a reason to buy a
> PS/2-70 (heaven forbid...;').

What you will have when you plug in this board is a 486 with
built-in cache running on top of a second cache designed for a
386. A secondary cache designed for the 486 should have considerably
different charactistics than result from using a primary 386 cache
as a secondary 486 cache.

You also get a built-in FP co-processor -- which may or may not
conflict with your existing 80387, but which will certainly obsolete
it.

So: 1 80386-25 and 1 80387-25 down the drain = $1000. Replacement
486 board at least $1500. Why not just wait and get a machine that's
designed for the 486?

More importantly, several other plug-in 486 replacement boards will
be annouunced shortly -- don't get stuck with the MCA and
IBM. Almost everybody else (in the same price range) does it better.
For the samme amount of money in 6 months you can buy a real 486 at
33 or 38MH from DELL or Compaque and have something that's well
designed. For less money, you will be able to buy one from CompuAdd
that's almost as good and still outperforms the IBM.

Jim Winer ..!lzfme!jwi (Usually unable to reply to email outside AT&T)

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