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but that shouldn't be needed in the first place, I would still boot up into 10.4.11 or 10.5.8 and see what system profiler reports for your machine

you should not need any sort of Cache enabler for that CPU, if it indeed uses a 7455, then as as long as your on the latest BootROM for your G4 cube 4.1.9 IIRC, then it should just work OOB so double check your BootROM version I would say also you have checked system profiler right? (I would...

Perhaps im mistaken and it turns out that IBM Mach5 604EV's use a different PVR, but are you sure thats a 604ev/Mach5 CPU? I ask the CPU type part of the PVR (Processor Version Register) given as "cpu-version" in your screenshots is listed there 0009 is that of a regular 604e CPU, my Own...

I sadly dont have anything helpful to add regarding the diagnosis other then it might be worth going over the PCB's and checking for cracks in the PCB's themselves, often when items like this get shipped because they are so heavy and have heavy components mounted on said PCB's, the shocks...

Yeah I see that :) but what I mean is, there where 2 distinct revisions of the whole G3 Blue and white Machine, the Rev A machines and the Rev B machines, and these Rev B machines had revised motherboards (and other different things, for example Rev B G3 blue and whites have a different hard...

nvm ignore this bit, although the older varient is mentioned here and there, if you scroll down to the BOM it calls for the later -402, variant, so this is indeed schematics for the Rev C motherboard used in the Revision B G3 Blue and white :) and this little snippet is quite interesting...

Oh thats Awesome! theres very few schematics out there for the later Apple desktops like this! already been quite interesting to go through at a first pass, for example there is a brief mention of the "Max" CPU on the VRM VID settings, which of course, Max being the code name for the G4 CPU, so...

not so sure on this one, this may well be the case, but from what I recall reading many years ago, sonnet themselves claimed it was some sort of errata between the 7450/7455 CPU and the MPC106 itself that prevented them from operating the whole lot at 100Mhz of course sonnet might of been BSing...

realised I did not follow up on this, but sadly a little bit after this someone else did contact sonnet, and from what I heard, they where not very helpful at all! I dont know if the staff had changed or he just got the wrong person to speak! I just know that a few years ago, admitadly...

I did a bit of digging on this front, turns out OWC themselves still have a couple pictures of the card on their website still, including one with the heatsink removed http://eshop.macsales.com/images/Items/plgpcigx10001largenohs.jpg check out that bodge wire on the top right in the...

interesting sounds like its not recognising the last PLL bit properly, If I recall correctly of the patches offered in the Powerlogix Patcher is for to patch the system for correct PLL/frequency reporting, I take it you you have tried selecting that option? (but maybe out of the box its only...

interesting :) what clock frequency/voltage where you running at? I wonder if it was tripping some sort of over current protection somewhere? I know that back in the day there was a prototype 900Mhz G4 Pismo upgrade https://lowendmac.com/ed/bashur/12db/pismo-unicorns.html I always wish there...

Just been thinking about this, which PLL are you using/setting to achive 800Mhz? since I know the 750FX and 750GX are a bit sepcial in that they have 2 PLL's PLL0 and PLL1, so I wonder almost if the Sawtooth BootROM is reading from the wrong PLL range? also as an aside if the 750GX supports 32...

thats pretty sweet! here is a schematic for a PowerMac 6500 Logicboard this system uses a CBGA255 603ev, and is compatible with a 740 in that if you BGA swap one on there, it will work OOB (with the only adjustments needed being vCore if your installing a PPC740L or MPC740P) so perhaps that...

you will likely always get 3 beeps if you remove onboard RAM, since the BootROM is hard coded to look for it and try and test it its the same as if you take the RAM chips off a SODIMM and install it into a Mac it will beep 3 beeps no good banks, rather then a single beep of no RAM, since the...

very interesting! I will have to dig out one of my Factory G3 Uninorth macs (one of my snow iBook's) and see how good or bad its main memory performance is, it will probably be my 750FX iBook G3 since thats the closest I have to your 750GX Sawtooth setup I would love to see one of your 750GX...

for what its worth, I think the commonly available Sonnet Firmware patcher does support the GigE TiBook that they offered a 7457 Mail in upgrade service on, as a long time ago I was poking around the Sonnet firmware patcher and I noticed mention of 4.2.9 firmware, which is the TiBook GigE :)

im just wondering @herd have you had a chance to try one of your 750/7400/7410 to 744X interposers with your Pismo yet? I bet a 7448 Pismo would be a very nice performance portable :)

as I understand it the choice of faster Grackle chips on the high end also produced yield issues, and production delays, hence the G3 PDQ which as I understand it stands for Pretty Damn Quick, as in, the Lore goes that Steve Jobs said something along the lines of you better fix it Pretty Damn...

for what its worth, I briefly tried BeOS with a Radeon 9200 Mac edition, with a 1080p monitor, ya get some interesting results! https://forums.macrumors.com/threads/powersurging-to-mac-os-x-10-5-8-power-macintosh-9600-fun.2144305/page-8?post=33260964#post-33260964