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interesting :)  id expect that CPU to work in a G3 BW, did you try and drop the FSB down to 66Mhz? (also might be worth running the G4 CPU patch, which stops the G3 BW from complaining about unsupported CPUs)

I remember reading about that on your blog (yay for google translate :) ) but I cant seem to find the article these days which CPU did you try I have noticed theres 2 types of 604 ZIFs one older? black type where you cant see the CPU it self, and a newer type which is a PCB with a 255CBGA...

http://ps-2.kev009.com/rs6000/redbook-cd/sg245144.pdf found this has some interesting info but nothing on the clock multiplier for the CPU sadly I do know when those 604e ZIFs are installed in G3 beiges the CPU speed is still set by the motherboard Jumpers, So I dont think the IBM ZIF CPUs...

indeed I have noticed those 300 pin ZIF 604 CPUs I have been meaning to pick one up to play with but I dont fee like paying £40 for a 20 year old CPU :)  but indeed I too would not be surprised if its just the 60x bus in a socket :)  I want to try one of these 604 ZIF CPUs in one of my BW G3s...

as Dan says the ZIF that comes with G3 BWs is not compatible with a 750CX but in theory you could design a new PCB that takes 750CXs. The PowerLogix 750FX/GX ZIF cards are surprisingly simply theres just the CPU it self and just a few passives on the card, i dont think it would be THAT hard in...

I know the Voltage is set by the CPU ZIF module  :)  (If you read back near the start of this thread you can see me discuss what might be the VID resistors) I have seen a few different designs of ZIFs including some sexy IBM ones with metal capped Cache chips :) but you have a pinout of the...

very cool! thank you for taking the time to reverse engeniner the Pismos Vcore stuff :) my Pismo is still humming along just fine at 2.0V with a Core Clock of 600Mhz :) the CPU Cooler does a surpassingly good job and keeping the overclocked 7410 cool. have you had any luck in reducing the...

this is very Awesome! its cool to see the L2 cache is working, what is the L2 cache voltage on this card? because the 7400 requires a certen pin be pulled high or low etc to set cache voltage, where is the MPC750 just passes it straight through IIRC. so its neat to see L2 works at all. and...

Considering it happens during the Boot screen which is strictly the OpenFirmware frame buffer it looks like indeed something is up with the Graphics chip or related circuitry

im going to guess finding the voltage of the L2 requires googling for the specific chips data sheet? when i get to the CPU card again (likely when i upgrade it to 1GB of RAM) ill make sure to grab a picture of the L2 and to check what voltage it is :) I have other Systems/chips i can check...

I am happy to report some good news in regards to my Pismo that I upgraded the CPU on as I mentioned in my other posts in this thread, while the CPU Swap went well it seemed the L2 cache did not want to work. a few weeks later i decided to give the 7410 a reflow to see if it would fix the L2...

interesting thats some good info there :) when you say 750 are you talking about the MPC/XPC750 or the PPC750L? as the PPC750L by IBM has 1.8v 2.5v and 3.3v cache support. IBM PPC750Ls seem quite popular on 300Mhz and faster G3 upgrades from sonnet etc and in apple PowerBooks/iBooks/iMacs, I...

thats a a very good spot :) (I saw it in the datsheet but never gave it much thought...) must also explain why (aside from core voltage) why my 7410 did not Post properly when soldered onto the 266Mhz ZIF... (iv not checked the L2 cache voltage on that but id not be surprised if its 3.3v as...

well since i dont feel like writing another super long post again ill Just leave https://forums.macrumors.com/threads/diy-g4-cpu-upgrade-round-2-putting-the-power-into-flowerpower.2040272/here :) I have to thank Max1zzz for all the effort and work he put into my iMac G3 for me :)

Awesome! glad to see the G4 Pismo thing is working well for you :)   I say you should be able to clock the 500Mhz 7410 to at least 550Mhz with out any issues, my 500Mhz 7410 is happily stable at 600Mhz in my Pismo :) im still doing some work on it but I do have something quite Awesome to...

Yeah thats what I have found as well hence the some point comment, at that price point it aint terribly high up on my priorities :) its a shame the 4400 is so buggy at a firmware level as its not a bad computer otherwise

I dont know the dip switch settings off the top of my, head you will have to google for those or check the box it came in if it has one. but yeah if its showing up as 1.6Ghz in a GigEthernet G4 then your going to have to adjust the dip switches for a quicksilver otherwise it would run too fast...

Np most of the PDFs/product sheets are out there with a little bit of googling and use of the wayback machine :) I have been keeping an eye on ebay for PPC CPUs and i spotted some 740s I might at some point grab one of those and see if I can slap it in to my PowerMac 4400 as the MPC740 and...

indeed there must be voltage jumpers :) here are some data sheets http://datasheets.chipdb.org/IBM/PowerPC/7xx/PowerPC-740-750.pdf this ones for the PPC750L (LoneStar) http://cache.nxp.com/assets/documents/data/en/fact-sheets/MPC750FACT.pdf?fsrch=1&sr=2&pageNum=1 handy not quite...

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...