I actually found a couple at work. They're slightly smaller, but I think they'll be ok? My plan is to use a little super glue in each corner and some Arctic silver in the center. That should be ok, right?
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Upgrading to Full 68040 - Heatsink Needed?
- Thread starter Guybrush3pwood
- Start date
How do I set the clock speed on the new processor? Never done it on these old macs before.
http://lowendmac.com/2014/overclocking-the-mac-quadra-series/
check here they have links to the ones that can be changed and how.
check here they have links to the ones that can be changed and how.
Either by adjusting the multiplier of the CPU by adjusting some (small) resistors on the motherboard, or adjusting the frequency of the CPU by replacing the clock crystal - all models differ.
I've used GPU, 486, northbridge heatsinks on my '040 CPUs to great effect - doesn't need much (if anything), but the cooler the better in these old dears.
I've used GPU, 486, northbridge heatsinks on my '040 CPUs to great effect - doesn't need much (if anything), but the cooler the better in these old dears.
Holy crap, didn't realize this was that complicated. Thought I could just plug and play.
Ah well, screw it. Bought the wrong processor anyway. This is all more trouble than it's worth.
Ah well, screw it. Bought the wrong processor anyway. This is all more trouble than it's worth.
Yes, it is plug and play to switch an LC040 to full 040 - it's only if you want to overclock the CPU you need to perform the resistor and/or crystal swap.
And wrong CPU, as in speed? A 25Mhz 040 will probably drop in and run fine at 33Mhz, and a 33Mhz will down clock to 25Mhz without any adjustments.
And wrong CPU, as in speed? A 25Mhz 040 will probably drop in and run fine at 33Mhz, and a 33Mhz will down clock to 25Mhz without any adjustments.
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Ok, not sure what anyone is saying. The plan was to swap the stock cpu on my LC 575 with this:
http://m.ebay.com/itm/111633589714?euid=53fb61ae6fb34856a8be059ee404075d&_mwBanner=1
But I'm assuming that since my stock runs at 33mhz, and the one I bought runs at 33mhz, there's probably little point in doing so, correct?
http://m.ebay.com/itm/111633589714?euid=53fb61ae6fb34856a8be059ee404075d&_mwBanner=1
But I'm assuming that since my stock runs at 33mhz, and the one I bought runs at 33mhz, there's probably little point in doing so, correct?
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I bought one from the same seller and did the upgrade on the same logic board as you did. Applications that take advantage of the full 68040's floating point unit will be dramatically faster than with the original 68LC040 processor. On the LC version, floating point operations are emulated in software, which can take 10-20x as long. Non floating point operations will run about the same. Some software requires a floating point unit and will not run on your original 68LC040.
As for frequency, hardware on the logic board, not the processor determines the speed. If you found a 40MHz 68040, it would run at 33MHz unless you modify your logic board (as per the links others have posted.)
In short, you bought the right processor for your machine. Some applications will be hugely faster, others will be the same. Given the mask codes the seller has, a heatsink is not mandatory, but is a good idea.
As for frequency, hardware on the logic board, not the processor determines the speed. If you found a 40MHz 68040, it would run at 33MHz unless you modify your logic board (as per the links others have posted.)
In short, you bought the right processor for your machine. Some applications will be hugely faster, others will be the same. Given the mask codes the seller has, a heatsink is not mandatory, but is a good idea.
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Ok, so it's still a good idea to do the swap then?
I am sitting here just trying to figure out what software we could use today, that would take advantage of the co-processor?
What about Wolfenstein 3d? Runs like crap on my 575s.
