Help with overclocking (kind of)

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Joined: Feb 1 2005
Posts: 16

Hello,
I want to put a 68040/40 on my lc575 board and I guess I need to change to a 20mhz oscillator. I found Chris Lawsons page on the parts needed but I can't seem to find the 'how-to' on actually changing out the oscillator.
Since I won't really be overclocking the chip, do you think I can get away without using a heatsink/fan?
Thanks all for the help.

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Joined: Feb 1 2005
Posts: 16
found the link

via this forum to Jag's house. Still wondering about the heatsink and fan...

moosemanmoo's picture
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Joined: Aug 17 2004
Posts: 686
If I remember correctly, the

If I remember correctly, the 40MHz 68040s used a rather minimal heatsink. No fan. As for changing the oscillator, I think you would have to remove the old one and solder in the new one.

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Joined: Dec 20 2003
Posts: 180
Mystic Overclocking - from the web archive
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Stuart Bell,
Developer of the PowerCC site a long time ago.

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Joined: Feb 1 2005
Posts: 16
Success at 40mhz

Got my mystic running at 40mhz now, with a 68040/40 chip. That was a fairly nerve racking soldering job - at least for me - made the vga mod to the analog board seem easy in comparison. Pretty cool result though!!! Now to get it running faster Smile I don't need the serial ports to work, just my network card and I've got 70ns vram. Anyone got some faster than 20mhz oscillators they want to swap? I've got one at ~18 and another at ~19.