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To: Bilow who wrote (54980)	9/24/2000 6:23:12 PM
From: mishedlo	Read Replies (1) \| Respond to of 93625

<<This is a good question, and is a possible indication of your desire to learn something.>> Yes, I am trying to learn something thank you. When you respond beligerantly to me I do the same to you until I just put you on ignore for a while. <<All this goes back to showing why it is that when another company makes a DDR DIMM, it has to be "qualified" to show it works in a given motherboard. RDRAM has the same problem, that is why Intel publishes a list of RIMM modules that are compatible on their website. As I've said before, if you want an early DDR machine, you should buy it with all the memory already installed, it could save you a lot of headaches. All that stuff is likely to be worked out a couple quarters later. One of the worst (modern) problems is the serial PROM that holds data regarding the DIMM. SDRAM has had numerous problems with those. RDRAM has had a fairly easy life largely because it has not been available from very many memory makers. Compatibility problems magnify when you have large numbers of suppliers.>> Does RDRAM have an easy life because of a published Rimm spec, instead of the limited number of suppliers as you suggest. << that is why Intel publishes a list of RIMM modules that are compatible on their website>> Is there a RIMM other than perhaps MU's that is not qualified? If not, I suggest RDRAM has an easier time because of a single spec. <<All that stuff is likely to be worked out a couple quarters later. >> Isn't it kind of silly to push out a product and worry about problems a quarter or 2 later? If INTC did this would you be having a laugh attack right now?

To: Bilow who wrote (54980)	9/24/2000 6:43:24 PM
From: sylvester80	Respond to of 93625

Bilow, Except that the DDR spec is still going through many ballot changes. In fact, some MMs are still using different Gerber files on their designs. Also JEDEC has not yet voted on balloted changes on a 100% reliable method for memory vendors to guarantee reliable tDQSQ/tQH parameters. Which means that there will be differences in MMs designs. Also, DDR DLL design is not specified in the DDR spec and is causing incompatibilities between different DIMM vendors. The whole JEDEC process is slow, ineffective and full of competitive "disadvantages" among its members (no reason to distinguish one MM over the other which translates to less sales and financial losses as price becomes the only differentiating factor and leads subpar production and parts). And it is proof why DDR is still vaporware and many problems are still up ahead for it. I can't actually wait for DDR to hit the channel. The reality of the DDR fiasco once it is released and the publicity of the problems, will be the final nail in their coffin. It's a PR disaster waiting to happen. No wonder they haven't yet released it and even after they do, they don't want it in volume production (as VIA said by limiting it to white boxes and not to brand name OEMs - the volume pushers). They want to limit the carnage till they can figure out how to (or better yet if they can) fix the problems.