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ah thats good to know :)   I have a drive-less 9600 that one of these days I really need to sort out some sort of SCSI drive for at some point! (I use a PCI ATA card for most things I do with it, but that does not work if I want to mess with the more obscure OS's like OS X Server 1.x for...

interesting little setup! if theres space perhaps look to see if a Pismo heatsink will fit, they work by having a little square plastic thing that clips onto the CPU package itself, then the heatsink is screwed onto that :)   (might be worth buying an entire Pismo CPU card heatsink and all...

Just popping in to say via tip off from @Daniël Oosterhuis this is really awesome stuff!  keep up the Awesome work ,im very interested to see how it all turns out :)   I have a (fortunately working) SE, but really want to get an SE/30 or upgrade my SE with an SE/30 motherboard!

what was the heatsink clip setup exactly? from what you describe it sounds a lot like the plastic square that Lombards and Pismos used, that would snap round the ceramic package of the CBGA360 CPU itself and then have 2 screw holes for a heatsink to screw into perhaps one of these plastic...

BTW has anyone contacted sonnet? I hear they are generally quite willing to provide detailed technical info on their old PPC CPU upgrade cards wonder just how much info we could get from them, schematics, board layout info and any technical notes would be neat! LOL

yeah would be interesting to see what can be done :)   ah cool find I had seen the first PDF but not the IBM one :)   maximum size for L3 cache is generally 2MB the 7457 can "do" 4MB but only up to 2MB of it can be used as L3 cache I wonder if the L3 cache setup you mentioned can just be...

with some semi cheap 7457's showing up on ebay it would be really interesting to see if they work on one of these sonnet cards :)   perhaps time to revisit this project? @Bolle  :)   https://www.ebay.com/itm/184311937918 I also came across this most interesting normal apple G4 CPU card...

what you need is the sonnet L2/L3 cache enabler for OS X :)   http://www.sonnettech.com/support/kb/kb.php?cat=319&expand=_a2_b169_b230_b154_b228_b74_a13_b233&action=a3

its a Radeon 9200 Mac edition the sticker on the back will say Mac on it  and the card looks like this  hopefully this helps :) keep in mind while 7.6 will boot with the 9200, you wont have full graphics acceleration

user @dosdude1 offers such a service specifically for old macs :) I recommend you get in contact with him and check out his youtube videos

here is one max1zzz helped me out with when I was also getting started with all this BGA upgrade fun :)   https://forums.macrumors.com/threads/diy-g4-cpu-upgrade-round-2-putting-the-power-into-flowerpower.2040272/

the annoying thing about Apple Open Firmware on the G3 BW and newer is if it does not recognise the CPU thats been installed it will halt on purpose, older Firmwares like found in the beige Macs, will actually boot on an unknown CPU, obviously all the "extra" bits like L2 L3 cache dont get...

for OS X, Xpostfacto includes an OpenCHIPS6555.kext driver (or something along the lines of that name) might be worth having a poke at? :)

im in the same boat https://forums.macrumors.com/threads/powersurging-to-mac-os-x-10-5-8-power-macintosh-9600-fun.2144305/ sadly I have not been able to find much these days :/ like the OP, if anyone knows where to get some for relatively cheap lemme know :)

shame about the L3 cache vanishing, I have never had much luck with TSOP chips myself. with no L3 it would be a good board to experiment with, try a 7457 on it? those have 512KB of L2 so should help with the loss of L3. BTW have you tried contacting sonnet for some details on the CPU card? A...

Just wondering did you make any progress with this? :) I recently got a 9600 myself and Have been having much fun playing/experimenting with it which you can read about here :)  https://forums.macrumors.com/threads/powersurging-to-mac-os-x-10-5-8-power-macintosh-9600-fun.2144305/

thats so Awesome to see :) did you have to run a Custom build of OS X along-side the custom Mobo FW when testing the 7448 CPUs? because AFAIK no version of OS X has native 7448 CPU (CPU Upgrade companies who sold 7448 upgrades for PMs got around this via either Firmware patches that masked...

thats some very cool information! id be very interested in seeing pictures of the whole setup, its interesting how you used MDDs as test beds, im guessing Motorola made up custom CPU cards for the 7448s 360CBGA foot print? (as the stock MDDs use 7455s which are 483 CBGA packages) im very...

Looks like someone actually paid $360 for one of those 7457s on ebay  :O im a bit annoyed by that, not that I mind what someone spends their money on but I dont want these sellers thinking they get away with charging such obscene prices for such out dated and old CPUs...  :/

heres some iMac G4 schematics hopefully they are of use :)