If anything, it was the SiS645DX at a disadvantage, do to it's slower than FSB asychronous memory clock. And it still won, except in the truely stupid memory-only benchmarks and a couple others. Fact is that the SiS winning REALLY makes Intel look bad.
But the thing that put DDR in the lead in this case was probably the lower cas latency of DDR compared to RDRAM. I am absolutely sure in this case that having the memory run at DDR400 would have made the SiS chipset STOMP the i850, this should send a clear message to Intel and memory manufacturers that it is high time for DDR-II, since no chipset manufacturer has the balls to release a dual-channel DDR solution.
Yes, Dual Channel PC1600 would outperform single channel PC2700 when paired with the P4, assuming the chipset addresses it properly, and such a chipset could easily use PC2100 for 133FSB overclocking, or PC2700 for 166FSB overclocking. But alas, we are stuck with single channel standard DDR, making PC2700 a mearly adequate solution.
What's the frequency, Kenneth?