Actually got to change my sig..lol
i got a new mobo and such a p4s533 - with pc-2100 - which i will change to pc-3500 (for ever more leeway on memory fsb speeds)
the reason to get a 400mhz FSB CPU is because the mobo support's 533 - so that gives me an extra 133mhz to work with on over clocking.
it was much like the PIII 100fsb chips and the 133fsb chips.
the 100' over clock MUCH futher beacuse there was more headroom on the FSB speed - where as the 133 - was already maxing out the CPU / memory and mother board.
So what you would do is get a cpu that was 100fsb - and a mobo and memory that was 133fsb - which gave u that 33mhz extra to work with with out worrying about ruining your mobo or memory.
it is the same case with P4's
i will have that extra 133mhz FSB to work with on my system and likely get more! over clocking out of my cpu, then i would if it was a 533 FSB - as long as it is a northwood, or what evere core.
Been reading up on this religiously, some suggest i get a 2.0a chip as many have gotten that up to 3ghz mark with water cooling, which is what i am looking into.