Path: utzoo!utgpu!water!watmath!clyde!att!ucbvax!RICHTER.MIT.EDU!krowitz
From: krowitz@RICHTER.MIT.EDU (David Krowitz)
Newsgroups: comp.sys.apollo
Subject: More on new workstations
Message-ID: <8807212113.AA05459@richter.mit.edu>
Date: 21 Jul 88 21:13:27 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The Internet
Lines: 22

More on the new workstations ...  I was under the impression that
Motorola had claimed that the 68030/68882 chips would be quite a
bit faster than the 68020/68881 chips operating at the same clock
rate. They said something about the on-chip memory management of
the 68030 cutting down on the number of clock cycles needed to
complete an instruction. In light of this, wouldn't you expect
the 25-MHz 68030 in the DN3500 to have a higher MIPS rating than
the 25-MHz 68020 in the DN4000?

For that matter, why would the 33-MHz chip in the DN4500 be rated
at 7 MIPS when the 25-MHz chip in the DN3500 is rated at 4 MIPS?
That's a 75% increase in MIPS with only a 50% increase in clock
rate. Do both machines have equivalent caches?


 -- David Krowitz

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