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To: John Walliker who wrote (73850)	5/29/2001 7:18:20 PM
From: Bilow	Respond to of 93625

Hi John Walliker; Re: "Do you agree that there are many variants of DDR?" I agree. The most common variant is the 266MHz 128Mb x8 parts, which are traded on the spot market. RDRAM is much more fragmented than DDR, and consequently isn't yet traded in the spot market. DDR has the advantage of scale, and that is before taking into consideration the ability of DDR to be produced on PC133 production lines. Here's the complete list of modern RDRAM (i.e. "direct" and in production or supposedly soon to be produced), variants. Would you please tell me which is the most common, and what percentage of total production that variant is? I'll assume that most production is 800MHz, and only list those types, just as most DDR production is 266MHz: 54-pin normal 54-pin mirrored 62-pin normal 62-pin mirrored 80-pin normal 84-pin normal 92-pin normal Re: "Do you not agree that having many variants diminishes economies of scale?" Yes, I agree. That probably explains why RDRAM is so expensive. Re: "As for cost, is DDR considerably cheaper to buy or considerably cheaper to make, test and deploy?" Yes, DDR is considerably cheaper to buy, it is cheaper to make, it is cheaper to build boards for, it it is cheaper to test, and it is cheaper to deploy. That's why the industry has gone over to it already, and Intel is busily catching up. Now which of those RDRAM packages is the cheapest one, the one that has the advantage of economies of scale again? Are you sure? LOL!!! -- Carl