Throughout all of our benchmarks we can clearly see that the PC1066 memory that the Intel i850e supports comes out with a win, but one that is not exceptionally stellar by any means. The better choice when basing conclusions solely on the performance is the choice of PC1066. However, what about the price of this new RAM? Currently it would cost you about $80-90 or so to purchase 256MB (2 X 128MB) of PC800 RDRAM. This price has fallen a lot since the initial release of RDRAM, and is now a solution that doesn't cost much, if any more than DDR. But if you look for pricing on PC1066, to buy the same amount of RAM it would cost $160-200, over twice that of the PC800, and the PC1066 definitely doesn't offer twice the performance. Still, the RAM is very new and the price should drop but as it stands now I don't think that PC1066 is worth this price premium. PC800 still performs very well, and with the new 533MHz FSB and 512K of cache, the new Pentium 4 CPU's should leave you very pleased with their speed.