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criticized this as making it more difficult for power users to differentiate between the various Athlon XP chips. For example, two chips could be given the same "PR" branding but have much different engineering
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line of processors. These processors were faster than
Pentiums of the same speed in some benchmarks, so Cyrix gave them a Performance Rating faster than their clock speed. Some
89:(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.
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132:, which was released in 2001. The efficient Athlon XP chips could perform better than similarly-clocked chips from Intel's competing
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line-up, which depended on high clock speeds to overcome their low IPC. As a result, AMD believed consumers would be swayed by the
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217:"Cyrix Corporate Information -- New P-Rating System for Microprocessors Simplifies Consumer Evaluation of Personal Computers"
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but were popularly compared to the
Pentium 4. As a result, the branding became colloquially known as a "Pentium Rating".
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processors with a "PR2" rating but dropped this after consumer confusion. AMD revived the branding for its
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This article is about rating computer CPU performance. For performance rating at the workplace, see
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running at 75 MHz. The designation "P75" was added to the chip to denote this. Later that year,
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The first use of the PR system was in 1995, when AMD used it to assert that their
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Figure of merit developed by AMD, Cyrix, IBM Microelectronics and SGS-Thomson
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speed, etc), which would affect their performance at different tasks.
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248:"A Brief History of CPUs: 31 Awesome Years of x86"
77:in the mid-1990s as a method of comparing their
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338:Maximum PC Guide to Building a Dream PC
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140:. These chips were rated against the
29:performance rating (work measurement)
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300:McLaughlin, Laurianne (2001-11-02).
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109:also adopted the PR system for its
371:, February 1996. Uses Winstone 96.
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273:Shimpi, Anand Lal (1997-04-03).
121:models also use the PR system.
223:from the original on 1996-09-26
246:Lilly, Paul (April 14, 2009).
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81:processors to those of rival
201:. Vol. 15, no. 7.
101:processor was as fast as a
85:. The idea was to consider
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124:AMD initially branded its
33:performance rating (chess)
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334:"AMD, the Feisty Upstart"
191:Metz, Cade (1996-04-09).
31:. For chess ratings, see
193:"Trends: Cyrix Scores"
87:instructions per cycle
18:True Performance Index
401:Computer performance
332:Smith, Will (2005).
71:IBM Microelectronics
302:"AMD Strikes Back"
142:Athlon Thunderbird
47:performance rating
16:(Redirected from
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275:"AMD K6 Review"
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363:External links
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138:megahertz myth
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55:Pentium rating
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316:. Retrieved
312:the original
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284:. Retrieved
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257:. Retrieved
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225:. Retrieved
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377:on wikichip
205:p. 31.
198:PC Magazine
75:SGS-Thomson
385:Categories
318:2012-01-08
286:2023-08-18
259:2023-08-18
227:2019-12-17
175:References
147:Maximum PC
280:AnandTech
134:Pentium 4
130:Athlon XP
375:P-rating
307:PC World
253:PC Gamer
221:Archived
163:See also
99:AMD 5x86
93:Branding
51:P-rating
103:Pentium
348:
155:size,
126:AMD K6
119:AMD K5
115:6x86MX
153:cache
107:Cyrix
83:Intel
67:Cyrix
53:, or
346:ISBN
113:and
111:6x86
73:and
41:The
391:AMD
157:bus
79:x86
63:AMD
387::
340:.
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277:.
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236:^
195:.
183:^
69:,
65:,
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43:PR
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151:(
45:(
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