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To: grok who wrote (6)9/7/1999 2:39:00 PM
From: Dave B  Read Replies (1) of 271
 
KZ,

Anyone understand the AL460GX Merced diagram that the Register posted. In the upper right it sez: "Dual Memory Ports; 4.2 GB/sec peak; 64 SDRAM DIMMS; 64 GB max." The chip set consists of a SAC address chip and a SDC data chip. Data from DIMMs moves at 266 MT/s so it must be 128 bits wide or else two 64b ports which must be what they mean by Dual Memory ports. Notice no Rambus anywhere.

Old news. Check the Rambus thread (probably June/July timeframe, maybe earlier) for the discussion. The basic upshot of the discussion is that Merced was due out about a year before RDRAM was due out, so RDRAM was obviously not included in the design. As Merced slipped, the last thing they would have done would have been to change the memory interface to another new technology. They're trying to get it done, not continue to upgrade it (no creeping elegance!).

Search for Merced and Rambus on the regular thread. You'll probably be able to find it.

Dave
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