Power and CAD considerations for the 1.75mbyte, 1.2ghz L2 cache on the alpha 21364 CPU

  • Authors:
  • Joel Grodstein;Rachid Rayess;Tad Truex;Linda Shattuck;Sue Lowell;Dan Bailey;David Bertucci;Gabriel Bischoff;Daniel Dever;Mike Gowan;Roy Lane;Brian Lilly;Krishna Nagalla;Rahul Shah;Emily Shriver;Shi-Huang Yin;Shannon Morton

  • Affiliations:
  • Compaq Computer, Shrewsbury, MA;Intel Corporation, Shrewsbury, MA;Compaq Computer, Shrewsbury, MA;Compaq Computer, Shrewsbury, MA;Intel Corporation, Shrewsbury, MA;Intel Corporation, Shrewsbury, MA;Compaq Computer, Shrewsbury, MA;Intel Corporation, Shrewsbury, MA;Compaq Computer, Shrewsbury, MA;Intel Corporation, Shrewsbury, MA;Compaq Computer, Shrewsbury, MA;Compaq Computer, Shrewsbury, MA;Intel Corporation, Shrewsbury, MA;Intel Corporation, Shrewsbury, MA;Intel Corporation, Shrewsbury, MA;Compaq Computer, Shrewsbury, MA;Compaq Computer, Shrewsbury, MA

  • Venue:
  • Proceedings of the 12th ACM Great Lakes symposium on VLSI
  • Year:
  • 2002

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Abstract

A 1.75 MByte L2 cache has been designed and fabricated as part of the Alpha 21364 microprocessor[1] (Figure 1), in a .18m bulk CMOS process. The cache was designed to run at 1.2 GHz, and pass-1 samples confirm this. While Alpha CPUs are known primarily for high speed, the combination of package constraints and a tight schedule forced careful attention to the integrated whole of power expenditure and the interaction of CAD with design. The cache consumes only 7% of total die power.