Well, Anand and others keep on saying that PC1066 RDRAM will be significantley more expensive than PC800, and the only thing that is going to make it this expensive is simply lack of demand. Which will be very unfortunate. However, for the most part, all Samsung PC800 can hit PC1066 speeds, now it's not guaranteed, but as long as your board can run at PC1066, most Samsung PC800 can. It isn't avialable yet though, mid May, Intel will be releasing among other things, 850e with 533fsb Support, and this chipset will support PC1066 and PC1066 should be avialable at the same time.