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From: dean@coplex.UUCP (Dean Brooks)
Newsgroups: comp.sys.amiga.hardware
Subject: Re: RISC Amiga
Keywords: A RISC Mac?  So what?
Message-ID: <207@coplex.UUCP>
Date: 1 Nov 90 17:26:18 GMT
References: <1156@iceman.jcu.oz> <1990Oct30.173846.6928@idt.unit.no> <1990Oct31.012758.26467@jarvis.csri.toronto.edu> <1990Oct31.170315.25808@idt.unit.no> <1990Oct31.165728.3196@jarvis.csri.toronto.edu>
Organization: Copper Electronics Inc.; Louisville, Ky
Lines: 32

leblanc@eecg.toronto.edu (Marcel LeBlanc) writes:

>daglem@solan5.solan.unit.no (Dag Lem) writes:

>Another thing to note is that based on published performance claims,
>Motorola's statements of VAX-MIPS are not nearly as trustworthy as MIPS'.
>Here are a few numbers comparing measured SPEC data vs. Published MIPS:
>(these numbers were compiled by John Mashey)

>SPEC	SPEC 	SPEC	Published	System
>Integer	Float	mark	mips
>14.6	10.8	12.2	17.0		Motorola 8864SP, 20MHz, 128K
>18.3	13.5	15.2	21.0		Motorola 8864SP, 25MHz, 128K
>21.4	15.8	17.8	25.0		Motorola 8612, 33MHz, 32K

>19.4	16.8	17.8	20.0		MIPS Magnum, 25MHz, 64K

>Motorola's idea of MIPS is not as inflated as other companies, but you do
>have to take their claims with a grain of salt.

   What's even more peculiar is that the 20MHZ 8864SP drops in at 35.7 MIPS
in real life.  And we can achieve that speed rating on a semi-loaded
machine most of the time.  Its one thing to talk about the speed difference
between CISC and RISC, but it is entirely different when you actually sit
down and put a use to one.  Fastest damn FP I have seen in a mini.
Apparantely, the above values a wee bit understated.
   
--
dean@coplex.UUCP   Dean A. Brooks
                   Copper Electronics, Inc.
                   Louisville, Ky
UUCP: !uunet!coplex!dean