Pentium III Xeon

From Computing Knowledgebase

This page uses Creative Commons Licensed content from Wikipedia (view authors).

In 1999, the Pentium II Xeon was replaced by the Pentium III Xeon. The initial version, "Tanner", was just like its predecessor except for the addition of Streaming SIMD Extensions (SSE) and a few cache controller enhancements found in the "Katmai" Pentium III. The second version, the "Cascades", was based on the "Coppermine" core branded Pentium III. The Cascades had a 133 MT/s bus and only a 256 KB on-die L2 cache resulting in almost the same capabilities, as the Coppermine desktop Slot 1 versions (branded Pentium III) also capable of dual-processor operation, but not quad-processor operation. To improve this situation, Intel released another version, officially also named "Cascades", but often referred to as "Cascades 2 MB". That came in two variants: with 1 MB or 2 MB of L2 cache. Its bus speed was fixed at 100 MT/s, though in practice the cache was able to offset this. Product codes for Tanner and Cascades mirrored that of Katmai and Coppermine; 80525 and 80526 respectively.