Rambus (RMBS) - Eagle or Penguin Message Board

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Technology Stocks : Rambus (RMBS) - Eagle or Penguin

RMBS 87.70

-3.8%

Nov 18 3:59 PM EST

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To: richard surckla who wrote (48548)	8/1/2000 10:53:44 AM
From: gnuman	Read Replies (3) of 93625

Richard Surkla, re:, 1 GHz RDRAM Dave B. and I had a discussion on this over a month ago. Message 13938143 At that time I expressed the opinion it wouldn't be used in PC's and Rambus confirmed this. While the narrow RIMM bus has it's advantages, one of the penalties is a very narrow "valid data" window. The requirement for 4 "reads" to assemble 64 bits means the "valid data" eye is about 1/4 that of DDR which reads all 64 bits in one cycle. With PC800 I believe it's about 125 pico seconds. Going to PC1000 it will drop to 100 ps or less. Compare this to the Samsung presentation that shows the "valid data" window at 500 ps for DDR266, about four times as wide as PC800. This is a critical parameter that shouldn't be discounted. inqst.com (page 19) I was impressed by the quality of the waveforms shown in this presentation. Certainly doesn't look like the "unstable" claims of many. JMHO's

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