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IBM to Ditch SRAM for Embedded DRAM on Power CPUs
Processors & Memory
Written by Gizmo   
Thursday, 01 March 2007 22:03
According to a presentation that chip designers from IBM made recently at the IEEE's annual International Solid State Circuits Conference in San Francisco, the company has perfected a way to embed Dynamic RAM, or DRAM--the normal kind of main memory used in computers--into microprocessors rather than having to resort to the much more transistor-intensive Static RAM, or SRAM, commonly used in on-chip L1 and L2 cache memories.

Read the full story at IT Jungle:

IBM has been testing the embedded DRAM concept for microprocessors for a while, and in fact used embedded DRAM in the variants of the stripped-down PowerPC 440 cores that are the heart of the processors used in its Blue Gene line of massively parallel supercomputers.

But now IBM researchers say that they have perfected the technology to the extent that IBM plans to use embedded DRAM in future 45 nanometer processors that will be built using a silicon-on-insulator process that is similar to that which IBM has been perfecting since SOI was introduced way back in 2001 using a 130 nanometer process.

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