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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 :)

ill mention a few things 1 your going to need a Firmware Patch for the 7457 to boot 2 I have schematics for all iMac G4s, and on the first gen ones which use 7450 CPUs, there are un-used pads for some L3 cache however I dont know exactly what needs to be populated for those to work, they do...

very nice work! shame the L3 refuses to show up :/  have you seen how far you can clock the stock CPU? the fastest 7450 Apple used was on the 867Mhz quicksilver IIRC but I hear late 800Mhz eMacs can clock up to 1.33Ghz but I cant recall if those had 7450s or 7455s. also interesting on the...

very interesting, which resistors are those exactly on both the 745x based Beige PCI cards and on the MDX upgrades? im guessing the 745x upgrades have regular PLL Resistors as they dont have to worry about auto-ranging since the bus speed is always set to 50Mhz with one of these... I have...

very nice work! im quite interested in how you managed to overclock the sonnet CPU card? generally sonnet CPU cards are not overclockable... (I have a 500Mhz 7410 Sonnet encore ZIF id love to be able to fiddle with multiplier on that especially as in my 83.3Mhz bus G3 beige it sets the...

so im happy report some good new developments in the world of swapping CPUs around  :)   the first one relates to Core voltage of various PPC CPUs, since the start of this whole thing we had been wondering how do we check the Core voltage of various PPC CPUs/Macs when yesterday it hit me, we...

(forgot to mention, the L2 cache in the iBook, according to the L2 Cache chips data-sheet it says it works at both 3.3V and 2.5V, seeing as the L2 cache is working fine with the 7410 im guessing its running at 2.5V in the iBook I guess I could check with a DMM at some point to find out for sure ...

Just wanted to let you guys know that I was able to successfully swap the PPC750L in my iBook G3 clamshell for a 533Mhz 7410 from a DA CPU card :) I made a nice detailed post about it...