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From: boris@world.std.com (Boris Levitin)
Newsgroups: comp.sys.mac.misc
Subject: Re: Mac speed
Keywords: MHz, SE/30, IIci
Message-ID: <1990Aug29.044314.13616@world.std.com>
Date: 29 Aug 90 04:43:14 GMT
References: <1990Aug28.002743.1564@caen.engin.umich.edu> <1990Aug28.032555.26185@world.std.com> <4386@sage.cc.purdue.edu>
Distribution: usa
Organization: The World @ Software Tool & Die
Lines: 37

ar4@sage.cc.purdue.edu (Piper Keairnes) writes:

>boris@world.std.com (Boris Levitin) writes:

>>To accelerate a computer, it's not enough to change
>>just the speed of the CPU and FPU; you must also speed up (or replace with
>>faster versions) many the chips with which they interact.  That's why you
>>need an accelerator board and not just a faster CPU.

>Just as well, one should consider the SCSI performace and overall
>capabilities of the parts involved. To merely plop a 50MHz 68030 in a Plus
>and then try to compare its performace to a 40MHz IIfx is far-fetched. The
>IIfx and the IIci are streamlined high performance machines (as far as Macs
>go). Their entire architecture is such that the maximum performance from the
>increased clock rate is attained.

>The Plus architecture cannot fully exploit the power in a 50Mhz accelerator
>board. The August (I think) issue of MacUser gives you a breakdown of
>performance of accelerator boards and comparable performance to the Mac line
>of computers. Pick it up...

>-----
>Piper Keairnes
>ar4@sage.cc.purdue.edu

Sure, I'm sorry if I indicated otherwise.  The only thing an accelerator
board (on the Plus or another computer) will change is processing speed.  Even
with the Gemini II 50MHz 030/882, the Plus will have a slow SCSI bus, no
more than 4MB RAM, etc.

Boris Levitin
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