> > > overclock easily to 40 MHz, and now I've found a cheap source of

With stock 25Mhz LC040s? Or did you upgrade them?

Which method did you use to clock-chip?


>From: John Klos <john@sixgirls.org>
>To: Ken Hughes <hughes@interchange.ubc.ca>
>CC: port-mac68k@netbsd.org
>Subject: Re: overclocking and 64mb SIMMs
>Date: Wed, 29 May 2002 22:12:22 -0400 (EDT)
>
>Hi,
>
> > > I have many Quadra 605 / Performa 475 machines. They are excellent,
> > > overclock easily to 40 MHz, and now I've found a cheap source of 64 
>meg
> > > SIMMs. Interested in learning more?
>
> > I'll certainly bite.  I am interested in learning more.
> > I thought 64mb SIMMs couldn't be used on nearly all 68K Macs
> > (I have a little ring of Q800s, a 750 and an 840).
>
>For starters, the 64 meg SIMMs work just fine in the 40 MHz Quadra 605 /
>Performa 475 systems. I haven't tested them in any Q800 / Q650 yet, but
>I'll report the status of that when I have a go.
>
>They're physically small enough that there is no issue with installing
>them while a heat sink is on the 68040 (of course), and they're CHEAP -
>$less than $12.00 USD apiece!
>
>This is how they are listed:
>SNFP32U/064/F5V4K   64 MEG 16*32 4K REF APPLE/MAC 72 PIN SIMM
>
>The place is Coast to Coast memory and you can find the listing here:
>http://www.18004memory.com/category.asp?pagetoview=2&catid=9&subcatid=9
>
>I only buy from them over the phone - their web site's credit card stuff
>is a little wacky and I don't trust it. (1-800-4MEMORY)
>
>
> > Please tell me (us) more.  Do you have a little HOW-TO
> > so I can overclock my old Centris 650?
> > I'd hazard a Q800 to 50 Mhz.  What do you think?
> > How much (and under what environments) for the 64mb SIMMs?
>
>All of my Quadra 650 / 800s run just fine at 40 MHz, but I've not had one
>go up to 50. I have an 840AV that runs at 50 MHz, but the NuBus no longer
>works, so I'm going to try 48 MHz, then 44 Mhz.
>
>As soon as I can borrow a digital camera, I'll create a little HOW-TO with
>pictures; in the meanwhile, check out:
>http://homepage.mac.com/schrier/mhz.html
>
>John Klos
>Sixgirls Computing Labs




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