If you can overclock to 166 or past that then it might be able to use it, but otherwise you don't need it.
It will just make it easier so that when you do overclock, you won't be overclocking your memory, just your fsb.
It will work ok with the mobo though, just will be defaulted to whatever you're running your fsb to(ie. stock = 133x2 so like PC2100).