Home▸ Forums▸ 68kMLA▸ Wanted: Advice on performing 68040 upgrade for Q605 — #12
Post #12 by trag
Source Forum68kMLA
CategoryTroubleshooting
Post DateThu, 4 Feb 2010 - 16:28
Original URLhttps://68kmla.org/bb/threads/wanted-advice-on-performing-68040-upgrade-for-q605.19492/
Post
nb: 40MHz is not always stable though. A heatsink/fan for the 040 would be a good idea.
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I can confirm it - at 40 MHz heatsink is a must and you should use at least 33MHz processor if overclocking that baby!
My Q605 had processor socket with notches which permitted fitting a heatsink from Q650/700 variety. I also installed real 40 MHz 68040 and changed Motorola PLL chip. After these mods machine have been stable for something like 8 years or so.
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Did you do the 40 MHz modification on a Q605? If so, did you use one of the two methods listed on Marc Schrier's page with wires and such, or did you just do the resistor swap for 40 MHz?

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