You just don't understand. The supported CPUs are using a 64-bit path to the chipset, at DDR*133 (aka DDR266). That is exactly the same as the bandwidth of PC2100 DDR SDRAM, which is also DDR266. If you wanted the memory speed to be greater, you would see very little gain, as the memory can only I/O information at the rate the processor feeds/accepts it. It all slows down to the CPU's bus speed at the chipset.