Thresh's Firingsquad heeft de primeur met de eerste review van een Pentium III. Veel is er niet verandert ten opzichte van de PII en we hoeven dan ook geen heftige dingen te verwachten wat betreft de performance van het dingetje:
The "next-generation" in Intel's lineup of performance PC processors, the P3 is actually based on the same Pentium II core, with a few additions that, if nothing but from a marketing point, should make it a "must-have" upgrade. There have been rumors before release that the Katmai will ship with a 64KB L1 cache, but at least for the release of the 450Mhz and 500Mhz versions, that isn't true. The Pentium III will initially ship with 32Kb cache, the same as the Pentium II.
How will this affect its performance? Consider the fact that the PentiumMMX 200 was roughly 10% faster than the Pentium Classic 200, due to the doubled cache size (32KB on the MMX unit vs. 16KB on the Classic). Though a 10% performance gain per doubling in cache isn't necessarily the case, the Pentium III could very well have taken advantage of the additional 32K, if nothing for prefetch memory streaming in KNI. More on that later.