Performance Rating

This article is about rating computer CPU performance. For performance rating at the workplace, see performance rating (work measurement). For chess ratings, see performance rating (chess).

The PR (performance rating, P-rating, or Pentium rating) system was a figure of merit developed by AMD, Cyrix, IBM Microelectronics and SGS-Thomson in the mid-1990s as a method of comparing their x86 processors to those of rival Intel. The idea was to consider instructions per cycle (IPC) in addition to the clock speed, so that the processors become comparable with Intel's Pentium that had a higher clock speed with overall lower IPC.[1][2]

  1. ^ Metz, Cade (1996-04-09). "Trends: Cyrix Scores". PC Magazine. Vol. 15, no. 7. Ziff Davis, Inc. p. 31.
  2. ^ "Cyrix Corporate Information -- New P-Rating System for Microprocessors Simplifies Consumer Evaluation of Personal Computers". 1996-02-05. Archived from the original on 1996-09-26. Retrieved 2019-12-17.