he's talking about the KT7A, not the KR7A. KT7A uses the KT133A chipset and SDRAM, KR7A uses KT266A and DDR. The KR7A-133 or whatever its called just uses ATA133 hard drives.. but ATA133 is just a ton of useless HD bandwith.. there's really no difference between ATA66/100/133 except that 133 drives cost a lot more.