Date: Mon, 23 Oct 1995 19:22:42 +0930 (CST) From: Michael Smith <msmith@atrad.adelaide.edu.au> To: sysseh@devetir.qld.gov.au (Stephen Hocking) Cc: hardware@freebsd.org Subject: Re: Functional differences between various 486 CPUs Message-ID: <199510230952.TAA02490@genesis.atrad.adelaide.edu.au> In-Reply-To: <199510230945.JAA20420@netfl15a.devetir.qld.gov.au> from "Stephen Hocking" at Oct 23, 95 07:45:56 pm
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Stephen Hocking stands accused of saying: > > I've just laid hands on a cheap 33Mhz 486 motherboard to replace my 25MHz > 386sx/387sx setup (yeah, well educating a kid, marriage problems & a mortgage > tend to drain the supply of ready cash) and am hunting around for a CPU to put > in it. So far I've seen the following - > > Clock Manu. Chip Price (Oz dollars, don't panic!) > 66MHz IBM 486 $93 This is a Cyrix part; it should cost you $73 (Westan, 23% s/t, available in bot 5 and 3.45V flavours. You want the "486 DX2/66") > 66MHz Intel 486 $199 Don't bother. > 100MHz IBM 486 $145 Again a Cyrix part, not available in 5V. Your best bet for a 5V-only motherboard is possibly the 80MHz Cyrix part, at $80. (Westan, 23% s/t, "486 DX2/80") > Which ones are 5v and 3.5v, which 3.5v parts have the onboard regulator to > allow using them in old motherboards like mine, and what differences are there > in regard to cache & onboard maths copro presence? I've no specific details on the cachefulness or otherwise of the Cyrix parts; all I can say is that they seem to work perfectly well. 8) > I'm lusting after one of the 100Mhz parts, but accept giving budget that I'll > probably end up getting the 66MHz IBM unit iff it'll go in my 486 m'board and > it has a math-copro. For the heat sensitive units, my case has a 15cm fan > blowing over the motherboard. It's noisy enough and shifts a fair bit of air. The Cyrix parts are all fanless, as are the Intel DX4/100's. > Stephen -- ]] Mike Smith, Software Engineer msmith@atrad.adelaide.edu.au [[ ]] Genesis Software genesis@atrad.adelaide.edu.au [[ ]] High-speed data acquisition and [[ ]] realtime instrument control (ph/fax) +61-8-267-3039 [[ ]] My car has "demand start" -Terry Lambert UNIX: live FreeBSD or die! [[
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