How it come? Does it mean really from what I can read in CFWDGAFSR's post that they just replaced the only processor and added RAM, leaving the rest intact?
Is it possible that there is something else involved when you replace just a processor (BIOS update, memory timing changed, cache disabled [sorry for that, just guessing], an adapter board issue if any, etc.)?
What about in order to troubleshoot the problem let the P3 1Gig to run with only 128 MB of RAM,
vc. putting the P3 733 MGz back but with 768 MB of RAM?
Sort of an easy test to see what happens.