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Technology Stocks : Rambus (RMBS) - Eagle or Penguin
RMBS 94.82+2.7%Nov 26 3:59 PM EST
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To: gnuman who wrote (42440)5/17/2000 3:42:00 PM
From: jim kelley  Read Replies (1) of 93625
 
Why not....

You left out one the main finding of the article:

"at HotChips '99 detailing the pincount and die size for various North Bridge memory configurations, including SDRAM, DDR, and RDRAM. Because North Bridge components are generally pad limited, the number of I/O's on the chip directly affects the die size. AMD's data showed that a 64 bit DDR North Bridge has a die size 25% larger than an equivalent single channel RDRAM device. Extrapolating from that data to include the additional pins required to implement a 3.2 GB/s interface would indicate that a 128 bit DDR North Bridge would have a die size approximately 60% larger than an equivalent dual channel RDRAM device.

Conclusion

Clearly, there is no SDRAM solution for the 3.2 GB/s of bandwidth needed for the next generation of high speed front side busses coming from AMD and Intel. Willamette will be paired up with Tehama, a two channel Rambus North Bridge. To remain competitive, AMD is going to need an equivalent solution, either DDR or RDRAM."

Do you have any idea what the cost of the this increased die size??

To really get to the heart of the cost comparisons we need to have a systems level cost comparison. It looks like DDR starts costing more at systems level than an equivalent RDRAM system. We are talking more pins, bufered DIMMs, and die size increases. This is what Sony found in their PS-II choice.

Too bad there are no DDR PC systems to analyze.

:)
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