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- Path: soap.news.pipex.net!pipex!usenet
- From: m.hendry@dial.pipex.com (Mathew Hendry)
- Newsgroups: comp.sys.amiga.applications
- Subject: Re: Blizzard 1260 Help
- Date: Fri, 1 Mar 96 01:23:38
- Organization: Private node.
- Distribution: world
- Message-ID: <19960301.6697D8.1B04@ai061.du.pipex.com>
- References: <1773CA40FS86.JWILDE@ukcc.uky.edu>
- NNTP-Posting-Host: ai061.du.pipex.com
- X-Newsreader: TIN [AMIGA 1.3 950726BETA PL0]
-
- Jim Wilde (JWILDE@ukcc.uky.edu) wrote:
- : I just installed my new Blizzard 1260 in my trusty 1200, with 16megs of Ram.
- : SysInfo shows it as having an '040, not 060, and 38 MIPS...quite respectable,
- : but I know its got an '060, and the docs say it should cruise at 80 MIPS. I've
- : used the enclosed CPU060, and CyberPatcher, and still can't make it hum any
- : faster. Any suggestions anyone? CPU060 shows it as an 060 in its printout.
- : What to do?
-
- 1. SysInfo has no way of knowing that you have an 060, since it reads ExecBase
- structures to determine the CPU type. These structures only extend up to the
- 68040 at present. Furthermore, the 68060 did not exist when the most recent
- version of SysInfo appeared, so it can hardly be expected to recognise it.
-
- 2. SysInfo's MIPS rating is even more useless that other MIPS ratings, because
- it fits completely into the caches of the 68040 and 68060. This gives a
- completely unrealistic measure of performance for those CPUs.
-
- 3. SysInfo does not understand its own MIPS ratings above a certain value, so
- you would be getting wrong results even if the test algorithm itself was
- representative.
-
- 4. MIPS is a useless rating anyway - the same CPU could do 20 or 100 MIPS
- depending on which instructions you throw at it. Never take any notice of
- MIPS ratings.
-
- -- Mat.
-