Just figured id make a quick post about something I noticed in that I think the 333Mhz tray loading iMac Max did at the start of this May have used a 2.6v 750 it would explain why it ran so hot and never clocked past 400Mhz
my thinking for it being a 2.6V 750 is that despite it being stated that all 300Mhz and faster G3s use the 250Nm 1.9V core, the Chip in Maxes photos Looks like one of the first 750s the 266Mhz 750 from my G3 beige looks the same right down to the paper surround
its not the only 333Mhz tray loader i have seen like this,
https://www.journaldulapin.com/2014/07/10/booster-un-imac-g3-avec-ssd-processeur-et-memoire/ in this french blog the 333Mhz iMac CPU card has the same CPU as Maxes one and evident from the Screen shot of system profiler it has an early PVR (2.2 the same as the 266Mhz G3 from m G3 beige) it looks like early iMac G3 333Mhz tray loaders got the higher voltage older Rev 750. If you still have the Chip Max could you post a detailed Photo of the Die so i can read the markings that would tell me what chip it is exactly and tell me what Voltage/Gen Chip it is
however it seems like later iMac G3 trayloaders got the newer PPC750L from IBM, User Daniël Oosterhuis recently was taking apart a 333Mhz iMac G3 for a project and I asked for Pictures of the CPU Card and much to my surprise the CPU was an IBM PPC750L (the CPU also had the later style plastic foam surround but it had been removed by the time the picture was taken) it seems like Apple standardised on the IBM PPC750L after the first run of G3s the only deviation I have seen to this was 400-450Mhz XPC750s found in BW G3s all others 1999 and newer 750 Macs i have seen (Lombard, Pismo, iBook G3 clamshell, iMac slot loading etc) seem to all use the IBM PPC750L, this also means the Bellow CPU card should work well with 7410 fitted as it seems every PPC750L thats been replaced with a 7410 has worked well afterwords
what this also means is we might be able to figure out what sets the CPU Vcore on these iMac CPU Cards by comparing the one bellow to 2.6V card ill have to Ask Dan for some high detailed shots of both sides of the card (BTW the MPC106 on the other side dates to week 24 of 1999)