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From: irf@kuling.UUCP (Bo Thide')
Newsgroups: comp.sys.hp
Subject: Re: Re: Dream System (sort of)
Message-ID: <1857@kuling.UUCP>
Date: 23 Dec 90 13:57:16 GMT
References: <1990Dec14.095519.14818@hellgate.utah.edu> <17780001@hpfcmgw.HP.COM>
Reply-To: bt@irfu.se (Bo Thide')
Organization: Swedish Institute of Space Physics, Uppsala, Sweden
Lines: 48

In article <17780001@hpfcmgw.HP.COM> chan@hpfcmgw.HP.COM (Chan Benson) writes:
>Previously, I posted this and then tried to delete too late...
>
>>> Does speed not matter?  The Sparcs are much (10x?) faster.
>>
>>I'm willing to admit some advantages to Sun, but the Sparcstation I is
>>about the same performance as the 400t.  At the worst the multiplier is
>>some number greater than one and less than two.  It's certainly nowhere
>>near ten.
>>
>>			-- Chan
>>
>>If all the false statistics presented on usenet in a year were placed
>>end to end they would circle the equator 50,000 times.
>
>OOOOOOOOOPSSSSSSSSSSSS!
>
>And I'm doing my part to make that happen. I should have qualified
>my performance statement with the word "integer". The SparcStation I
>is 3 to 4 times faster than the 400t on floating point benchmarks.
>
>The 68040 upgrade will pretty much close that gap.
>
>			-- Chan

To put this discussion into perspective, here are the MIPs and MFlops ratings
as published by HP:

Model  SPU/Clock speed     MIPs     MFlops
--------------------------------------------
425t   MC68040/25 MHz      20       3.5
433s   MC68040/33 MHz      26       4.5

Both the 425 and the 433 were initially shipped with an 68040 emulator
card, based on the MC68030/50 MHz delivering 12 MIPs and 0.5 MFlops.

Sun are known to sometimes overestimate their MIPs rating by 10-20% and to
use the inflated arithmetic mean of the Single and Double Precision
LINPACK MFlops rating whereas HP always has used the uninflated Double
Precision LINPACK values.  I hope HP keeps their more honest policy.

Bo

   ^   Bo Thide'--------------------------------------------------------------
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