The Pentium M

In order to meet the new challenges posed by the power-efficient computing paradigm, Intel’s Israel-based design team drew on the older, time-tested P6 microarchitecture as the basis for its new low-power design, the Pentium M. The Pentium M takes the overall pipeline organization and layout of the P6 in its Pentium III incarnation and builds on it substantially with a number of innovations, allowing it to greatly exceed its predecessor in both power efficiency and raw performance (see Table 12-1).

Table 12-1. Features of the Pentium M

Introduction Date

March 12, 2003


0.13 micron

Transistor Count

77 million

Clock Speed at Introduction

1.3 to 1.6 GHz

L1 Cache Size

32KB instruction, 32KB data

L2 Cache Size (on-die)


Most of the Pentium ...

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