Semiconductor & Computer Engineering
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Difference between revisions of "p-rating"
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| − | {{title|Performance Rating (P-Rating)}} | + | {{title|Processor Performance Rating (P-Rating)}} |
| − | '''[[name:: | + | '''[[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 was 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. |
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| + | 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. | ||
== Measuring P-Rating == | == Measuring P-Rating == | ||
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# Run Winstone 96 using the target processor and record the score for this processor. | # 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. | # 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. | ||
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| + | == Documents == | ||
| + | * [[/IBM Microelectronics: Four companies announce new, simplified method for consumers to measure microprocessor performance in PCs]] | ||
| + | * [[/Processor Performance Rating (P-rating) Specification]] | ||
Revision as of 16:23, 21 August 2016
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 was 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.
Measuring P-Rating
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.