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Xref: sserve comp.unix.misc:9092 comp.os.linux:54709 comp.os.386bsd.misc:977 Path: sserve!newshost.anu.edu.au!munnari.oz.au!constellation!aardvark.ucs.uoknor.edu!ns1.nodak.edu!netnews.nwnet.net!ogicse!uwm.edu!wupost!howland.reston.ans.net!agate!doc.ic.ac.uk!uknet!comlab.ox.ac.uk!mbeattie Newsgroups: comp.unix.misc,comp.os.linux,comp.os.386bsd.misc Subject: Re: What are the various PC bassed Unix box OS? Message-ID: <1993Sep13.084852.1164@black.ox.ac.uk> From: mbeattie@black.ox.ac.uk (Malcolm Beattie) Date: 13 Sep 93 08:48:52 GMT References: <1993Sep02.184251.23903@engr.engr.uark.edu> <2C8E9252.3016@news.service.uci.edu> <michaelv.747547179@ponderous.cc.iastate.edu> <1993Sep12.235912.32501@unixland.ci.net> Organization: Oxford University Computing Services, Oxford, U.K. Keywords: pc,unix Article-I.D.: black.1993Sep13.084852.1164 Originator: mbeattie@black Lines: 31 In article <1993Sep12.235912.32501@unixland.ci.net> bill@unixland.ci.net (Bill Heiser) writes: >In article <michaelv.747547179@ponderous.cc.iastate.edu> michaelv@iastate.edu (Michael L. VanLoon) writes: >>>>iiitac@swan.pyr (Alan Cox) writes: >>>>>In article <chmae.747045462@guug.de> chmae@guug.de (Christoph Maethner) writes: >>>>>>I don't think I will ever need a 486 , I would perfer more RAM. >>>Wouldn't this, however, be an argument *for* getting a 486? I am just >>>wondering, as I have heard that UNIX on a 486 should conceivably run >>>better because the 486's hardware, especially if it has a local bus, >>No matter how fast the drive and controller, RAM will always be >>faster. > >I ran a Unix SVR3 on a 386/25. I then upgraded the machine to a >486/33. Overall system performance was *twice* as fast (using the >same peripherals) with the 486 machine than on the 386. That's because of the difference in clock speeds. A rule of thumb is that at a given clock speed a 486 is about 1/3 faster than a 386, and that performance increases roughly linearly (very, very roughly) in this range of clock speeds. Comparing your 386/25 with your 486/33 you can see where the factor of two comes from. The usual "386 v 486" question centres on the comparison of a 386/40 with a 486/33. --Malcolm -- Malcolm Beattie <mbeattie@black.ox.ac.uk> | I'm not a kernel hacker Oxford University Computing Services | I'm a kernel hacker's mate 13 Banbury Road, Oxford, OX2 6NN (U.K.) | And I'm only hacking kernels Tel: +44 865 273232 Fax: +44 865 273275 | 'Cos the kernel hacker's late