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- Path: sojourn1.sojourn.com!not-for-mail
- From: mharrell@sojourn1.sojourn.com (Matt Harrell)
- Newsgroups: comp.sys.amiga.misc
- Subject: Re: Speed: 68040 vs. 68060
- Date: 4 Mar 1996 21:06:16 GMT
- Organization: Sojourn Systems Ltd.
- Message-ID: <4hfm08$4s@tkhut.sojourn.com>
- References: <371.6633T989T2700@horus.co.jyu.fi> <1195.6634T1430T809@teclink.net>
- NNTP-Posting-Host: sojourn1.sojourn.com
- X-Newsreader: TIN [UNIX 1.3 941216BETA PL0]
-
- rad (rad@teclink.net) wrote:
- : Aki Laukkanen <daeron@horus.co.jyu.fi> wrote:
- : >>According to the Motorolla press release, which I could post here if
- : >>anyone really gives a hoot, states the the 50MHz 060 is capable of
- : >>maxing out at 250 MIPS, and averages 80 VAX MIPS.
-
- : >Bollocks. Hence 68060 can execute two instrucions in a cycle at max, the 50
- : >MHz model can go as high as 100 MIPS but not more.
-
- : Ok, just to clear things up. Your both wrong. The 68060's limit is 2 integer
- : instructions + one branch instruction per clock or 1 integer, 1 float and 1
- : branch instruction per clock. That's 150MIPS peak @ 50MHz. Realistic values
- : due to dependency conflicts, branch mispredictions, cache misses, etc. are
- : about half that. (Ref. M68060/D p. 2) (I suppose the original post could have
- : meant 250 VAX MIPS which is a different measure all together.)
-
- Actually, it's not an issue of wrong or right. I simply mentioned
- what I read (or maybe misread :-) in a Motorola press reslease, which
- I could post here if anyone cares. I really don't care much either
- way since I won't ever be buying an 060. They're too expensive for me
- now (and I'm much more concerned with amount of RAM than the
- processor, since I plan on installing NetBSD), and by the time I have
- that kind of spare cash, I would be more likely to look at a PowerPC
- system, or who knows what.
-
- I am curious, though, as to what "VAX MIPS" is. I wondered about that
- when I first read the press release.
-
- --
- -----========++++++++++**********************++++++++========-----
- Matt Harrell Amiga 1200 running AmigaOS3.0
- Lansing, MI U.S.A. CSA 12 Gauge 030/882RC@50MHz/SCSI
- mharrell@sojourn.com 2MB chip/16MB fast RAM
- 240MB IDE hard disk
- -----========++++++++++**********************++++++++========-----
-