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

To: John Walliker who wrote (28783)	9/6/1999 12:19:00 PM
From: Dan3	Read Replies (1) \| Respond to of 93625

Re: how you arrive at these numbers. Please explain... Look at the page: usa.samsungsemi.com and look at the list of components for SDRAM and RAMBUS. Don't worry about the modules/RIMMs which go to 1 gig on SDRAM and 512 meg on RAMBUS - some modules use up to 32 chips. The components indicate how many memory cells fit on a manufactureable die. 128m for rambus and 256m for SDRAM with the latest production equipment. The reason for this difference is that each rambus chip includes 16 sets of memory cells connected by 128 bit wide internal data structures and feeding a high speed controller that serializes that 128 bit slow data stream into a 16 bit wide fast data stream. SDRAM chips have one set of cells connected by an 8 bit wide internal data structure. A substantial part of the available area on the rambus chip is taken up by these wide data paths and control circuits. This is why, for a given generation, rambus chips have half the capacity of SDRAM chips, yet must sell for close to the same price. Rambus exchanges motherboard traces for on-chip traces. For the next few years, at least, that looks to be a bad exchange from a cost standpoint. Dan