The P-Rating helps PC manufacturers rate processors by delivered performance, and it helps end users understand true processor performance equivalencies while making their PC buying decisions. The P-Rating employs the industry-standard Ziff-Davis Winstone 96 benchmark, which uses best-selling Windows-compatible applications in a typical system environment. The rating methodology tests processors with multiple architectures from multiple suppliers in identical PC configurations, resulting in a fair and accurate picture of delivered performance.
 

In back to back tests the AMD K7 is approximately 5% faster than an Intel Coppermine of the same speed. The new Cyrix MIII is equivalent in performance to a K6/3 or Celeron of the same speed. The IDT WinChip is generally slightly slower than the equivalent speed K6/3 or Celeron.