PcBytes wrote on 2022-11-13, 11:32:
Depends on the mainboard. I think these rely on the mobo's VRM to automatically detect the CPU (in your case, I doubt any of those two will run 100 and 133FSB Coppermines (66FSB Celeron Coppermines do run, from what I experienced...) as they were usually made with Mendocinos in mind.) so if the mobo is made with Coppermine support in mind, it should set voltage accordingly.
Yep, they do. The slotket will just pass the unmodified voltage request "signal" from the installed CPU to the VRM. If the CPU asks for a voltage that the VRM cannot supply, it'll not output anything at all.
It's not uncommon that the VRM on old boards can supply the lower voltages newer CPU:s the board wasn't made for needs though. Best way to find out would be to check the datasheet for the VRM controller on your particular board. Or simply determine by testing, as mentioned the VRM won't output anything if it gets a request it doesn't understand, there's no risk of frying anything.