P2B rev 1.02 pentium III processor upgrade HELP!

[P2B]

Your answer is correct, but MOST of the revision 1.10 P2B's have the
later voltage regulator, the one with the "BCB" suffix.

Possible the probability varies by region? Considerably less than 50% of
the 1.10 P2Bs I've seen (Ontario, Canada) had BCB regulators.

 

[P2B]

Asus P2B revision 1.12 boards, and almost all 1.10 boards, have the
"BCB" voltage regulator that can go down to about 1.4 volts. Earlier
boards could only go down to 1.8 volts. Note, although it's an
overvoltage, 1.8 volts is ok for "Coppermine" core chips that were
supposed to run at 1.5 to 1.75 volts, and the usual approach is to use a
slocket with VID jumpers and just set them to force 1.8 volts.

AFAIK the lowest voltage Intel specified for a Coppermine is 1.6v.

However, 1.8 volts might be WAY too much for a Tualatin, depending on
what it was supposed to run at.

Tualatins are all specified at 1.5v according to
processorfinder.intel.com, but IME Celerons are labelled 1.475v and
PIII-S are labelled 1.45v. I'm not sure why Intel specified them that
high as all mine are stable at 1.4v except for one 1Ghz Celeron which
needs 1.5v to run at 1.5Ghz.

Some people *do* seem to get away with running a Tualatin at 1.8v, but I
certainly wouldn't recommend it.

 

[Barry Watzman]

That's interesting, because out of several dozen P2B's I have NEVER seen
a 1.10 P2B that did NOT have the BCB regulator.

 

[Bob]

That's interesting, because out of several dozen P2B's I have NEVER seen
a 1.10 P2B that did NOT have the BCB regulator.

I'm off to check mine since I'm in the upgrade process. What do I
look for to verify which regulator I have ?

Thanks,