PowerPC vs Intel: Top Tier Chip Performance Compared Including G4, G3, Pentium, Celeron, Alpha, Athlon And Ultra SPARC II

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Processor Performance Comparisons -SPEC 95

Below you will find various processor comparisons for PowerPC, Intel based chips and chips from other manufactures. Testing was done using SPEC 95 the industry standard for measuring raw processor performance and scores are based on the manufacturer's published results. Scores are relative to the top PowerPC chip (marked in red) - longer bars mean higher performance. Below you will find a table with the actual scores.

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

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

**Note that SPEC95 does not take advantage of the G4s "Velocity Engine" (AltiVec) which will provide 2 to 3 times this performance in software programs tuned to take advantage of it

Previous Processor comparisons. We welcome Your comments on these results

Actual Scores

Processor SPECint95 SPECfp95
Intel Celeron/333Mhz 13 9.63
Ultra SPARC II/400Mhz 14.0 22.8
Intel Celeron/366Mhz 14.2 10.4
G3/333Mhz 15.0 10.6
Intel Celeron/400Mhz 15.1 10.9
G3/350Mhz 15.7 11.6
Ultra SPARC II/450Mhz 16.2 23.9
Intel Celeron/466Mhz 17.1 11.8
Intel Celeron/500Mhz 17.9 12.2
G3/400Mhz 18.0 12.7
Pentium II/450Mhz 18.5 13.2
Pentium III/450Mhz 18.6 13.6
G4/400Mhz 18.8 18.1
G3/450Mhz 20.0 13.3
G3/466Mhz 20.5 12.3
Pentium III/500Mhz 20.7 14.6
G4/450Mhz 21.4 20.4
Processor SPECint95 SPECfp95
Alpha 21264/466Mhz 21.5 39.7
Pentium III/550Mhz 22.2 15.0
Alpha 21264/500Mhz 23.5 47.2
G4/500Mhz 23.5 22.7
Pentium III/600Mhz 24.0 15.9
Alpha 21264/525Mhz 24.1 37.0
AMD Althon/550Mhz 25.1 20.6
HP PA-RISC 8500/360Mhz 25.5 43.7
Alpha 21264/575Mhz 25.9 40.9
AMD Althon/600Mhz 27.2 21.6
HP PA-RISC 8500/400Mhz 27.4  
AMD Althon/650Mhz 29.4 22.4
HP PA-RISC 8500/440Mhz 30.8 48.7
Alpha 21264/667Mhz 32.1 49.0
Alpha 21264/500Mhz (2 Processors)   60.1
Alpha 21264/500Mhz (4 Processors)   80.1

For test systems configurations click here

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

External Links

  • 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