oops .. got your PM and didn't read this thread thoroughly. AIDA32 will tell you what speed your oc'ed memory is running at.
DDR333 is really 166 .. so a FSB150 is almost DDR333. That PC2700 is the sweet sport cause i that extra head room of the memory willl still sync with your highest FSB. PLus, it's Corsair so it has a bit of leeway above 166. I remember before PC3200 came out, people would hit FSB200 on slow timings with their Corsair modules.
there should be any different if you moved a p4p800 board if you are using the same CPU/memory. The mobo just gives you a better upgrade path.