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| − | {{title|Processor Performance Rating (P-Rating)}} | + | {{title|Performance Rating (P-Rating)}} |
| − | '''[[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. | + | '''PR''' or '''P-Rating''' ('''Performance 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 in Mid-[[1996]] in a collaborated effort by [[AMD]], [[IBM]], [[SGS-Thomson]], and [[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. 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}}.
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| − | == Measuring P-Rating ==
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| − | Performance rating was obtained by:
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| − | # Obtain a representative target system that supports both the {{intel|Pentium (1992)|Pentium}} and Cyrix/IBM/AMD processor (e.g. {{amd|Am5x86}} / {{amd|K5}}).
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| − | # Run [[Winstone 96]] using the Pentium Processor and record the scores for the various frequencies.
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| − | # Defragment the hard disk after each test run
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| − | # Replace the Pentium processor with target processor (e.g. {{amd|Am5x86}}).
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| − | # Run Winstone 96 using the target processor and record the score for this processor.
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| − | # 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 ==
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| − | * [[/IBM Microelectronics: Four companies announce new, simplified method for consumers to measure microprocessor performance in PCs]]
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| − | * [[/Processor Performance Rating (P-rating) Specification]]
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| − | * [[:File:AMD-K5 Processor Performance Brief (June, 1996).pdf|AMD-K5 Processor Performance Brief]]; Publication #20084 Revision B/0; June, 1996.
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| − | == Software ==
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| − | * [https://archive.org/details/PCMagBenchmark 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.
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| − | == Models With PR ==
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| − | <!-- NOTE:
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| − | This table is generated automatically from the data in the actual articles.
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| − | If a microprocessor is missing from the list, an appropriate article for it needs to be
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| − | created and tagged accordingly.
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| − | | |
| − | Missing a chip? please dump its name here: http://en.wikichip.org/wiki/WikiChip:wanted_chips
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| − | -->
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| − | <table class="wikitable sortable">
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| − | <tr><th colspan="6" style="background:#D6D6FF;">Processors With P-Rating</th></tr>
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| − | <tr><th>Model</th><th>Family</th><th>Launched</th><th>P-Rating</th><th>Frequency</th><th>Bus</th></tr>
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| − | {{#ask: [[instance of::microprocessor]][[processor p-rating::+]]
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| − | |?full page name
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| − | |?model number
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| − | |?microprocessor family
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| − | |?first launched
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| − | |?processor p-rating
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| − | |?base frequency#MHz
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| − | |?bus speed#MHz
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| − | |format=template
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| − | |template=proc table 2
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| − | |userparam=7
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| − | |valuesep=,
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| − | |mainlabel=-
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| − | }}
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| − | {{table count|col=6|ask=[[instance of::microprocessor]][[processor p-rating::+]]}}
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| − | </table>
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