B&W G3 CPU Swap and Jumper Question

[Innes]

Hi all, quick question. I have a B&W G3 with the entry level 300mhz chip in it, and a parts donor with 400mhz chip with twice the L2 cache. Do I just need to switch the CPU card and the jumpers over to upgrade it or are the logic boards different and would require the whole board to be switched over?

Cheers!

 

[Byrd]

Hi Innes,

Switch the CPU and set the jumpers on the board to 400Mhz:

http://drivejumper.com/ClockupG3/b%26wclockup.html

... I'd try 450Mhz first for the 400Mhz CPU

... keep in mind the 300Mhz board is probably a revision A board which has IDE issues; I'd check if your later 400Mhz is revision B: that's the board you want to keep and switch over entirely.

JB

 

[Innes]

Thanks for the response @Byrd, just given that a read, looks like a neat idea.

I've looked into the revisions, it would appear that both of these are Rev 2s, as the CMD chip is labled '646U2-402' as opposed to 'PCI646U2'.

I also tried putting the internal Zip over from the dead machine to the working one. Weirdly, when I tried that, it turned itself on when i plugged the machine in and refused to chime. Taking it out again sorted it out