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- Path: nyx10.cs.du.edu!not-for-mail
- From: jyardley@nyx10.cs.du.edu (Chris Yardley)
- Newsgroups: comp.sys.amiga.hardware
- Subject: Re: Overclocking a 68882 ?
- Date: 24 Mar 1996 17:38:03 -0700
- Organization: Tantric Lobotomy Commission
- Message-ID: <4j4ptb$avt@nyx10.cs.du.edu>
- References: <4h6pmr$cs4@leporello.cs.unibo.it> <19960301.50A578.11DB1@am148.du.pipex.com> <4hkon1$9e@newsy.ifm.liu.se> <Pine.BSD/.3.91.960311143019.777C-100000@sos.sos.net>
- NNTP-Posting-Host: nyx10.nyx.net
-
- In article <Pine.BSD/.3.91.960311143019.777C-100000@sos.sos.net>,
- Pete and Vicki <vpollard@sos.sos.net> wrote:
- >On 6 Mar 1996, Ulf Ljungdahl wrote:
- >
- >> Date: 6 MAR 1996 19:23:13 GMT
- >> From: Ulf Ljungdahl <de4ulflj@itu.liu.se>
- >> Newgroups: comp.sys.amiga.hardware
- >> Subject: Re: Overclocking a 68882 ?
- >>
- >> m.hendry@dial.pipex.com (Mathew Hendry) wrote:
- >> >Andrea Morolli (morolli@cs.unibo.it) wrote:
- >> >: I'm considering to clock my 33Mhz 882 at 50Mhz.
- >> >: Do you think it will work?
- >> >
- >> >Probably not. The 6888x FPUs seem to be a lot more sensitive to overclocking
- >> >than the 680x0 CPUs, and are very likely to blow if you attempt such a thing.
- >> >Motorola performs rigorous tests on these chips to establish the maximum
- >> >clock rate - do you think they would rate a chip at 33MHz if they knew that
- >> >they could sell it for substantially more as a 50MHz part and get away with
- >> >it?
- >> >
- >> >You can risk it if you want, of course, but "don't say I didn't warn you".
- >> >
- >> >-- Mat.
- >>
- >> I'm currently using my 25MHz 68882 at 36MHz and it doen't even get hot, so I'm
- >> thinking of trying even higer frequences.
- >
- >I hacked my A3000's 25MHz '882 to 50MHz as per the A3000-50.lha file on
- >Aminet. It worked fine for me for over a year before I sold the machine.
- >It cost me around $5 to make the modification, and never caused a single
- >problem under AmigaOS, NetBSD or Mac System 7.5.1. I recommend the hack
- >highly. I figured if problems started to show, I'd just pay the $50 for
- >a genuine 50MHz rated FPU and be done with it.
-
-
- I tried that and the machine wouldn't come up. Never even got to a
- kickstart load..
-
- --
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- Tantric Lobotomy Commission*Art meets Technology at the border of Insanity
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