I had trouble with this board past 220mhz(fsb), where it would give me a "boot disk failure" error. I cant believe I didnt think of it before, but I had to bump the chipset voltage 4% (this bios only allows % bumps, 2, 4, 6, and 8%). finally im able to at least run 2.4ghz until my other board gets back from RMA
Just thought id post this in case anyone ever ran into the same problem with this board.