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'''[[name::Processor Performance Rating]]''' ('''[[name::PR]]''' or '''[[name::P-Rating]]'''), often mistaken for "Pentium Rating", was a rating system that allowed various [[x86]] manufacturers to gauge the performance level of their [[microprocessor]]s against equivalent {{intel|Pentium (1992)|Pentium}}-level performance. PR specifications were finalized on January 25 and were introduced on [[first announced::February 5, 1996]] in a collaborated effort by [[designer::AMD| ]][[AMD]], [[designer::IBM| ]][[IBM]], [[designer::SGS-Thomson| ]][[SGS-Thomson]], and [[designer::Cyrix| ]][[Cyrix]] to provide a way to report processor performance. | '''[[name::Processor Performance Rating]]''' ('''[[name::PR]]''' or '''[[name::P-Rating]]'''), often mistaken for "Pentium Rating", was a rating system that allowed various [[x86]] manufacturers to gauge the performance level of their [[microprocessor]]s against equivalent {{intel|Pentium (1992)|Pentium}}-level performance. PR specifications were finalized on January 25 and were introduced on [[first announced::February 5, 1996]] in a collaborated effort by [[designer::AMD| ]][[AMD]], [[designer::IBM| ]][[IBM]], [[designer::SGS-Thomson| ]][[SGS-Thomson]], and [[designer::Cyrix| ]][[Cyrix]] to provide a way to report processor performance. | ||
| − | With the introduction of {{amd|K6}} in [[1997]], AMD extended this rating system by introducing '''PR2''', comparing models against [[Intel]]'s {{intel|Pentium II}} models. However, the rating system was quickly dropped when K6 processors exceeded PII performance clock-for-clock. | + | With the introduction of {{amd|K6}} in [[1997]], AMD extended this rating system by introducing '''PR2''', comparing models against [[Intel]]'s {{intel|Pentium II}} models. However, the rating system was quickly dropped when K6 processors exceeded PII performance clock-for-clock. The system was later revived for {{amd|Athlon XP}} for comparison with {{intel|Pentium 4}}. |
== Measuring P-Rating == | == Measuring P-Rating == | ||
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|template=proc table 2 | |template=proc table 2 | ||
|userparam=7 | |userparam=7 | ||
| − | | | + | |valuesep=, |
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}} | }} | ||
{{table count|col=6|ask=[[instance of::microprocessor]][[processor p-rating::+]]}} | {{table count|col=6|ask=[[instance of::microprocessor]][[processor p-rating::+]]}} | ||
</table> | </table> | ||
Latest revision as of 05:30, 8 July 2020
Processor Performance Rating (PR or P-Rating), often mistaken for "Pentium Rating", was a rating system that allowed various x86 manufacturers to gauge the performance level of their microprocessors against equivalent Pentium-level performance. PR specifications were finalized on January 25 and were introduced on February 5, 1996 in a collaborated effort by AMD, IBM, SGS-Thomson, and Cyrix to provide a way to report processor performance.
With the introduction of K6 in 1997, AMD extended this rating system by introducing PR2, comparing models against Intel's Pentium II models. However, the rating system was quickly dropped when K6 processors exceeded PII performance clock-for-clock. The system was later revived for Athlon XP for comparison with Pentium 4.
Measuring P-Rating[edit]
Performance rating was obtained by:
- Obtain a representative target system that supports both the Pentium and Cyrix/IBM/AMD processor (e.g. Am5x86 / K5).
- Run Winstone 96 using the Pentium Processor and record the scores for the various frequencies.
- Defragment the hard disk after each test run
- Replace the Pentium processor with target processor (e.g. Am5x86).
- Run Winstone 96 using the target processor and record the score for this processor.
- Compare the Winstone 96 score you get against the Pentium processors. The target processor's P-Rating is based on the highest freqeucny of the Pentium processor that the target processor's Winstone score surpasses.
Documents[edit]
- /IBM Microelectronics: Four companies announce new, simplified method for consumers to measure microprocessor performance in PCs
- /Processor Performance Rating (P-rating) Specification
- AMD-K5 Processor Performance Brief; Publication #20084 Revision B/0; June, 1996.
Software[edit]
- Ziff-Davis PC Benchmarks CD-ROM (PC Magazine Labs); Ziff-Davis Publishing Group PC Benchmarks CD-ROM, including Winstone 96 and Winbench 96 benchmarks. From PC Magazine Labs, including CPUmark32 and full-motion video tests. October, 1995.
Models With PR[edit]
| Processors With P-Rating | |||||
|---|---|---|---|---|---|
| Model | Family | Launched | P-Rating | Frequency | Bus |
| AM486DX5-133V16BGC | Am5x86 | 1997 | P75 | 133 MHz 0.133 GHz 133,000 kHz | 33 MHz 0.033 GHz 33,000 kHz |
| AM486DX5-133V16BHC | Am5x86 | 1997 | P75 | 133 MHz 0.133 GHz 133,000 kHz | 33 MHz 0.033 GHz 33,000 kHz |
| AM486DX5-133W16BGC | Am5x86 | 1997 | P75 | 133 MHz 0.133 GHz 133,000 kHz | 33 MHz 0.033 GHz 33,000 kHz |
| AM486DX5-133W16BHC | Am5x86 | 1997 | P75 | 133 MHz 0.133 GHz 133,000 kHz | 33 MHz 0.033 GHz 33,000 kHz |
| AMD-K5-PR100ABQ | K5 | 17 June 1996 | P100 | 99.99 MHz 0.1 GHz 99,990 kHz | 66.66 MHz 0.0667 GHz 66,660 kHz |
| AMD-K5-PR100ABR | K5 | 17 June 1996 | P100 | 99.99 MHz 0.1 GHz 99,990 kHz | 66.66 MHz 0.0667 GHz 66,660 kHz |
| AMD-K5-PR120ABQ | K5 | 7 October 1996 | P120 | 90 MHz 0.09 GHz 90,000 kHz | 60 MHz 0.06 GHz 60,000 kHz |
| AMD-K5-PR120ABR | K5 | 7 October 1996 | P120 | 90 MHz 0.09 GHz 90,000 kHz | 60 MHz 0.06 GHz 60,000 kHz |
| AMD-K5-PR133ABQ | K5 | 7 October 1996 | P133 | 99.99 MHz 0.1 GHz 99,990 kHz | 66.66 MHz 0.0667 GHz 66,660 kHz |
| AMD-K5-PR133ABR | K5 | 7 October 1996 | P133 | 99.99 MHz 0.1 GHz 99,990 kHz | 66.66 MHz 0.0667 GHz 66,660 kHz |
| AMD-K5-PR150ABR | K5 | 6 January 1997 | P150 | 105 MHz 0.105 GHz 105,000 kHz | 60 MHz 0.06 GHz 60,000 kHz |
| AMD-K5-PR166ABQ | K5 | 6 January 1997 | P166 | 116.66 MHz 0.117 GHz 116,660 kHz | 66.66 MHz 0.0667 GHz 66,660 kHz |
| AMD-K5-PR166ABR | K5 | 6 January 1997 | P166 | 116.66 MHz 0.117 GHz 116,660 kHz | 66.66 MHz 0.0667 GHz 66,660 kHz |
| AMD-K5-PR166ABX | K5 | 6 January 1997 | P166 | 116.66 MHz 0.117 GHz 116,660 kHz | 66.66 MHz 0.0667 GHz 66,660 kHz |
| AMD-K5-PR200ABX | K5 | April 1997 | P200 | 133.33 MHz 0.133 GHz 133,330 kHz | 66.66 MHz 0.0667 GHz 66,660 kHz |
| AMD-K5-PR75ABR | K5 | 7 October 1996 | P75 | 75 MHz 0.075 GHz 75,000 kHz | 50 MHz 0.05 GHz 50,000 kHz |
| AMD-K5-PR90ABQ | K5 | 7 October 1996 | P90 | 90 MHz 0.09 GHz 90,000 kHz | 60 MHz 0.06 GHz 60,000 kHz |
| AMD-SSA/5-75ABR | K5 | 27 March 1996 | P75 | 75 MHz 0.075 GHz 75,000 kHz | 50 MHz 0.05 GHz 50,000 kHz |
| AMD-SSA/5-90ABQ | K5 | 27 March 1996 | P90 | 90 MHz 0.09 GHz 90,000 kHz | 60 MHz 0.06 GHz 60,000 kHz |
| AMD-X5-133ADY | Am5x86 | 1996 | P75 | 133 MHz 0.133 GHz 133,000 kHz | 33 MHz 0.033 GHz 33,000 kHz |
| AMD-X5-133ADZ | Am5x86 | 1996 | P75 | 133 MHz 0.133 GHz 133,000 kHz | 33 MHz 0.033 GHz 33,000 kHz |
| AMD-X5-133SDW | Am5x86 | 1996 | P75 | 133 MHz 0.133 GHz 133,000 kHz | 33 MHz 0.033 GHz 33,000 kHz |
| AMD-X5-133SDY | Am5x86 | 1996 | P75 | 133 MHz 0.133 GHz 133,000 kHz | 33 MHz 0.033 GHz 33,000 kHz |
| AMD-X5-133SDZ | Am5x86 | 1996 | P75 | 133 MHz 0.133 GHz 133,000 kHz | 33 MHz 0.033 GHz 33,000 kHz |
| AMD-X5-133SFW | Am5x86 | 1996 | P75 | 133 MHz 0.133 GHz 133,000 kHz | 33 MHz 0.033 GHz 33,000 kHz |
| AMD-X5-133SFY | Am5x86 | 1996 | P75 | 133 MHz 0.133 GHz 133,000 kHz | 33 MHz 0.033 GHz 33,000 kHz |
| AMD-X5-133SFZ | Am5x86 | 1996 | P75 | 133 MHz 0.133 GHz 133,000 kHz | 33 MHz 0.033 GHz 33,000 kHz |
| AMD-X5-150ADW | Am5x86 | 1996 | P75+ | 150 MHz 0.15 GHz 150,000 kHz | 50 MHz 0.05 GHz 50,000 kHz |
| AMD-X5-150ADY | Am5x86 | 1996 | P75+ | 150 MHz 0.15 GHz 150,000 kHz | 50 MHz 0.05 GHz 50,000 kHz |
| AMD-X5-150ADZ | Am5x86 | 1996 | P75+ | 150 MHz 0.15 GHz 150,000 kHz | 50 MHz 0.05 GHz 50,000 kHz |
| AMD-X5-160 | Am5x86 | P75+ | 160 MHz 0.16 GHz 160,000 kHz | 40 MHz 0.04 GHz 40,000 kHz | |
| Count: 31 | |||||