Also, its pretty much useless (with AMD atleast) because it increases the ram bandwidth without increasing the CPU bandwitdh, so the extra doesnt get used. Basically it lets you run the ram at a different speed than the fsb.
Hehe, would've liked to have seen the new XP's have a fsb of 200 instead of 166
Course only one available board (Asus A7N8X) "could" officially support it right now, and JEDEC doesn't have official support for DDR400 (although this doesn't bother me I know it bothers some people)
There's nothing wrong with running it that way, using the mem divider to increase the memory bandwidth. The thing is that the cpu will only use the bandwidth as if it was DDR324, since that is the fsb.