L2 cache question

Hi,
I buried my cpu, just tinkering to raise temp to my custom cooling. My
512kb l2 cahe p4 died at same spot as an intel p2 i had..(close to it).
Multithreading better than ever? Anyhow, my friend had the 1mb l2 cache p4
on same 533 bus, it did alot of work more before same choking. Prioritizing
didn't seem to exist! (this is only after truly conquering heat to an
extreme) the only drawback is the cpu killed his mobo and was very hot
runner at loaded. Is the 800FSB better with 1mb l2 cache or does it matter?
I like the 533 and only want increase of L2, but I don't know all the facts,
and can't find an end users result.Any advice appreciated.