For example, you might have seen the two Gamespy pieces on the next Xbox, based not on internal information but what they've gleaned from developers currently using the kits. I know that it isn't one hundred percent correct - as I understand it the machine is superior to these prophecies in one major area - but the power of the equipment they are describing is already enough to set the heart alight. More interesting even than the raw numbers are the policies they plan to implement for developers, which they suggest are things like compulsory live functionality, custom soundtracks, widescreen, and 720p.
I think they're either referring to HD-DVD or RAM(not very likely though). I don't know if it would be able to clock the cpus even higher.