Thanks for the quick reply, sthayashi
! Those numbers are really useful, I was wondering just what I would be looking at. And the gain indeed seems worthwile. But we're never satisfied, are we? (Ok I should just speak for myself
) Sooo if I can (at least attempt to) undervolt lower without risking too much trouble, I would "go for the kill".
Is there any way to make the M/B start up at the high end of the available voltage range, for example by setting voltage to the high end before doing the mod? Maybe if I pinmod the CPU the M/B will automatically do that, since the previous voltage in the BIOS was higher? I feel safe about the 1.5V (I can always force the system clock to 100MHz per M/B jumper if that's necessary to POST), but not about the 1.25V.
PS: if people here told me that it's exceedingly unlikely that I'd be able to run at below 1.475V with stock speed on a desktop Barton 2500+ anyways, that would also settle the issue (I don't want to compromize my folding performance too much
). My impression from what I read here was, though, that my chances of undervolting further were not too bad.