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Technology Stocks : Rambus (RMBS) - Eagle or Penguin -- Ignore unavailable to you. Want to Upgrade?

To: John Walliker who wrote (33502)	11/1/1999 5:51:00 AM
From: capt rocky	Read Replies (1) \| Respond to of 93625

we seem to be overlooking two things. intc designed their new processors with rmbs rdram in mind,and they need it. and, sony declared ddr unstable for use in a game only application. it can't get more stable in a more complicated useage. i am getting catalogs from dell, tiger, etc. and no one is offering ddr or 133pc. after today they will be offering rdram. it's here. now, will it sell? rocky

To: John Walliker who wrote (33502)	11/1/1999 7:33:00 AM
From: Bilow	Respond to of 93625

Hi John Walliker; Sure there can be problems with DDR. But sending data at 266Mbits/sec is still a lot easier than sending data at 800Mbits/sec. Just no question about it. Slower is easier. Re settling in time. I already gave you a link which shows how to calculate bus settling time. That you can imagine it, and can see possible problems indicates that you are aware of the kinds of problems that can ruin high speed systems. Just like what ruined the Camino. Most of Rambus' problems came from pushing speeds at too fast of a rate. DDR just has a lot more timing, voltage, etc., margin. It is simply safer. All that stuff with clock generators in DDR is included in a Rambus design. It's just that they forced the DRAM makers to put it inside every chip, as well as the controller chip. This is difficult for the memory makers to do, as their processes are designed for memory, rather than high speed mixed signal. That's why it's a lot easier to get the TI stuff to work. Just because Rambus looks simple, doesn't mean that it is simple. That's just the outside appearance. You know better, you've read the RDRAM data sheets. (What you and I haven't yet done, probably, is read the RAC controller data sheets, incidentally. I still haven't seen the i840 data sheet. Do you have a link to it?) Rambus has the same clocking complication, but it is hidden inside chips where you can't even put a probe on it. Plus, it's running at 3x the frequency. Not a good thing. -- Carl