I don't know what settings the Fire Dragon has (manual isn't available so I don't have a clue). If it is like the other 478 socket Soyo boards, it doesn't have that ratios. It probably just lets you set it to DDR266, which at 100fsb was running at 133mhz, at 120fsb its probably only running 120mhz (this is only a guess though).
Maybe someone else with that board can help.