Since the new durons are based on a T-Bred, if the board has no issues w/ T-Breds then it should be ok. Having said that, I guess it really depends on what kind of SDRAM board you'll be using. IWill KK-266, for example, is based on a KT133A chipset but can not run anything higher than a regular T-Bird (most palominos are also ok but occasionally have cold boot issues while no T-Breds are possible). Not all KT133A chipset boards have this problem though. Also there are some KT266A based boards that can not run any T-Breds (especially the ones that have both SDRAM and DDR slots).