Date: Fri, 17 May 1996 10:29:50 +0930 (CST) From: Michael Smith <msmith@atrad.adelaide.edu.au> To: imp@village.org (Warner Losh) Cc: msmith@atrad.adelaide.edu.au, se@zpr.uni-koeln.de, babkin@hq.icb.chel.su, hackers@FreeBSD.org Subject: Re: EDO & Memory latency Message-ID: <199605170059.KAA07721@genesis.atrad.adelaide.edu.au> In-Reply-To: <199605170042.SAA05730@rover.village.org> from "Warner Losh" at May 16, 96 06:42:12 pm
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Warner Losh stands accused of saying: > > : Note also that many motherboards don't correctly support the P5-83, as I > : learnt to my significant annoyance. What was going to be a cheap-ish > : upgrade became total hell. > : > : $600 later I'm wishing I'd been able to get one of the AMD parts. > > OK. So I should look into the AMD chip rather than the P5-83. My > motherboard claims to be "Pentium Overdrive Ready" so there may not be > a big problem there. However, I purchased it a long time before the > Pentiums were even out, so maybe it doesn't do it well. So was mine; there are jumper settings described in the manual for the P24-T and P24-D and all. And it worked really well with a DX2 in it. (This was an old Data Expert board, FWIW). I ended up replacing it with a Soyo SIS-based ISA/PCI/VLB board (so I could keep my old video card), which works very very well, but was pretty dear (~$200AUD). > I take it then the amd chip is pin compatbile with the 486 I have and > that there will be *NO* problems in pulling one out and putting the > other in? There _should_ be no problems; if your board has jumper settings described for an AMD 486DX4 or similar it should work fine. > What kind of performance increase should I expect? Say on a make > world and also on CPU bound things. Well, some numbers out of the ol' Dhrystone-2 test gave my DX2/66 about 30K, the P5-83 about 70K and the P100 here at work about 100K. This was using the same binary on unloaded systems. 'world' times are harder to compare because I went to an NCR PCI SCSI controller and a faster motherboard, sorry. > Warner -- ]] Mike Smith, Software Engineer msmith@atrad.adelaide.edu.au [[ ]] Genesis Software genesis@atrad.adelaide.edu.au [[ ]] High-speed data acquisition and (GSM mobile) 0411-222-496 [[ ]] realtime instrument control (ph/fax) +61-8-267-3039 [[ ]] Collector of old Unix hardware. "Where are your PEZ?" The Tick [[
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