PowerPC vs Intel
Processor Performance Comparisons -SPEC 95

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Below you will find various processor comparisons for PowerPC and Intel based chips. Testing was done using SPEC 95 the industry standard for measuring raw processor performance.

The results directly below were obtained by using the benchmarking program SPECint 95 which measure Integer intensive tasks


Same results scored as a percentage of improvement over the 100Mhz 601 chip


The results below were obtained by using the benchmarking program SPECfp 95 which measures Floating Point intensive tasks


Same results as above only expressed as the percentage of improvement over the 166Mhz 603e Chip

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What Is SPEC?

SPEC, the Standard Performance Evaluation Corporation, is a non-profit corporation formed to "establish, maintain and endorse a standardized set of relevant benchmarks that can be applied to the newest generation of high-performance computers" (quoted from SPEC's bylaws). The founders of this organization believe that the user community will benefit greatly from an objective series of applications-oriented tests, which can serve as common reference points and be considered during the evaluation process. While no one benchmark can fully characterize overall system performance, the results of a variety of realistic benchmarks can give valuable insight into expected real performance.

SPEC is a non-profit corporation registered in California.

SPEC basically performs two functions:

SPEC develops suites of benchmarks intended to measure computer performance. These suites are packaged with source code and tools and are extensively tested for portability before release. They are available to the public for a fee covering development and administrative costs. By license agreement, SPEC members and customers agree to run and report results as specified in each benchmark suite's documentation. SPEC publishes news and benchmark results in The SPEC Newsletter and The GPC Quarterly. Both are available electronically through http://www.spec.org/ (and available in paper as a quarterly publication if necessary) this provides a centralized source of information for SPEC benchmark results.

SPEC95 refers to the total SPEC95 product provided by SPEC. SPEC95 is composed of two suites of benchmarks:

SPEC CINT95: a set of eight compute-intensive integer/non-floating point benchmarks SPEC CFP95: a set of 10 compute-intensive floating point benchmarks

These are intended to provide a measure of compute-intensive performance of the processor, memory hierarchy and compiler components (the 'C' in CINT95 and CFP95) of a computer system for comparison purposes.

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Internal Links

  • PowerPC Chip performance compared
  • Check out the Links Page for links to sites with more Processor information
  • More Windows vs Mac Comparisons
  • External Links

  • SPEC vs BYTEmark - which is the better, more accurate benchmark program
  • PentiumII vs the G3 / G4 - MaKiDo compares these two chips
  • Motorola - detailed information about the various PowerPC chips
  • PowerPC - source data for the benchmarks above
  • Intel - source data for the benchmarks above
  • SPEC 95 FAQ - all your questions about SPEC 95 answered