Hi, i am new to the forum and mac ownership generally, i hope that someone can help with this... I am waiting for delivery of a new macbook white (2.1GHz, 1Gby RAM) and have found a query that apple (sales and tech support) have been unable to answer. It doesn't seem to be mentioned in the guides either, but I may have missed it - please point me in the right direction if that's the case. Anyway the new Macbook White quotes a FSB processor speed of 800MHz, but ships with RAM at 667MHz (including upgrade options). I am wanting to upgrade to 4G, and have been looking at the options and Crucial seems favorite. Can anyone tell me why the RAM in the Macbook is not 800MHz when the FSB is, and wether it is worth me getting 800MHz RAM rather than 667MHz? I have been told that the RAM will clock down if necessary but I would rather get the right kit, and I don't want to overclock as I need max stability. Hope someone can help - Cheers!