Dan, Re: "After AMD developed and marketed DDR as a PC platform, Intel is copying the techniques."
AMD did not invent DDR, nor did they even do a majority of the development. JEDEC developed the technology. As a member of JEDEC, AMD may have participated, but they weren't the leading developer. Furthermore, their participation in the marketing of DDR was practically non-existent, so I can hardly see your point in that respect, either.
Now, Intel is using JEDEC's technology, and they have added their portions to the specs. It has nothing to do with copying AMD.
"But I guess nobody needs DDR until Intel starts shipping chipsets that support it. "
I'd say the Pentium 4 needs DDR memory (over standard SDRAM) much more than the Athlon needs it.
But I assume your point was that DDR has been an important technology for the industry, and without AMD backing DDR, Rambus may have been chosen as the leading technology, instead. While that may be a valid argument, I don't see either technology as having vast superiority over the other. The only difference is that DDR won the industry popularity contest, but not necessarily because it was the better technology.
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