Posted by: LaPorta on 2021-09-01 08:36:53Trying to get a deal on a nice Quicksilver, and wondered if this would be plug-n-play compatible with the existing processor:
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Posted by: waynestewart on 2021-09-01 09:22:09No, unfortunately MDD processors aren't compatible with earlier Macs
Posted by: LaPorta on 2021-09-01 09:36:32I missed that it was MDD! Thanks,. My understanding otherwise is that, for instance, a Quicksilver processor would work fine in an earlier AGP Graphics model, is that true?
Posted by: LaPorta on 2021-09-01 10:07:44Here is a better question: I have an AGP Graphics 400 MHz model. If I popped an 867 MHz G4 in there from a Quicksilver, would there be any advantage at all to actually buying a quicksilver with regards to system bus, etc....I can't really find one in my sources. Seeing as the processor cards are ~$20 on eBay, and a quicksilver itself is $100-150 with heavy shipping costs, would just getting the card make more sense?
Posted by: waynestewart on 2021-09-02 17:08:11One difference is that the Quicksilver has a faster bus speed so unless you solder/unsolder some resistors on ta Quicksilver processor card it’ll run at a lower speed than normal. A 867mhz processor in a AGP will run at 650mhz.
Also one of the mounting screws on the Quicksilver supplies 12v. On an AGP you’d have to run a wire over to supply that.
Posted by: LaPorta on 2021-09-02 18:01:45Ok I can do that. What would I have to do to get the 867 to run 867 on the AGP?
Posted by: herd on 2021-09-02 18:29:49One of the pinned threads in this sub-forum talks about swapping CPUs:
http://www.jcsenterprises.com/Japamacs_Page/Processors.html An excellent page on compatibility of G4 CPU modules between different models. From theos911's post here.
68kmla.org
A quicksilver CPU can be used in an AGP, but you need to move/remove the IDE connector for the optical drive, change the bus multiplier for the CPU to run on 100MHz bus, add a 12v wire to supply power, and figure out a heatsink that will fit. Here is an example of one:
The CPU runs at a multiple of the bus, so you can't set it exactly to 867, but you could run it at 850MHz, or 900, 950, etc.
Posted by: LaPorta on 2021-09-02 18:43:03Figures...I should have done some more research into this first.
Posted by: Trash80toHP_Mini on 2021-09-04 19:22:44LOL, shouldn't we all? 😉