IBM to Ditch SRAM for Embedded DRAM on Power CPUs
February 19, 2007 Timothy Prickett Morgan
According to a presentation that chip designers from IBM made last week 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. 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 |