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Title: Micron 128 MB DDR3 chip
Description: In February 2005, Samsung was the first to announce a DDR3 memory prototype. Since that date, several manufacturers announced successful experiments in this domain. Platforms: DDR3 will be supported in Q3 2007 by Intel thanks to the Bearlake-X (DDR3-1333) and Bearlake-G+ (DDR3-1066) chipsets and by AMD with the AM3 Socket mid 2007.

Today, Micron the memory manufacturer announced to be the first to introduce a 128 MB chip of DDR3 memory. For now, this is a sample and mass production is scheduled at the beginning of next year. Micron hasn't given specific indications about the characteristics of this chip.

The main improvements of DDR3 memory are the voltage decreased to 1.5V from 1.8V in DDR2 and 2.5V in DDR and the prefetch increased from 2n (DDR) to 4n (DDR-2) and now to 8n bits. Memory cells internal organisation changed to have a transfer rate two times higher and still have a cell frequency of 133 MHz like with PC133, DDR-266 or DDR2-533.

The only frequencies improved to 533 MHz are the buffer inputs / outputs and external memory bus. This allows a transfer rate per pin of 1066 Mbits /s because of a DDR type transmission. It is important not to mix up DDR3 and GDDR3 (the latter is closer to the DDR2).

DDR3 will be officially released in DDR3-800, DDR3-1066, DDR3-1333 and DDR3-1600 versions. These are the official specifications validated by the JEDEC but in the long term, memory modules manufacturers will probably compete to be the first to release a DDR3-2000…
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