Intel Coppermine Slot 1 microprocessor

The main feature of Pentium III Coppermine core was integrated level 2 cache, so called "Advanced Transfer Cache". This cache was twice smaller than external L2 cache on Katmai processors, but it was twice as fast as external Katmai cache. It also had a few additional performance enhancements such as 256-bit data path to cache, lower latency and "Advance System Buffering" feature. All these improvements to the cache allowed the CPU to perform as fast or even faster than older Katmai processors. Because the new cache replaced external cache chips, big Slot 1 package was no longer necessary and it was replaced with smaller FC-PGA type package. Nevertheless, to support huge base of Slot 1 motherboards Intel continued to release Coppermine Pentium III processors in Slot 1 package. These processors had the same performance and other characteristics as socket 370 processors.

Coppermine Slot 1 processors were produced in speeds ranging from 500 Mhz to 1000 MHz. Intel announced and shipped limited quantities of 1133 MHz processor, but shortly after that the processor was recalled.

To compare different versions of Pentium III CPUs please see Intel desktop Pentium III CPU chart.