Enlarged color photograph of the Intel® Pentium® III microprocessor package. Clock Speeds: 450, 500, 550, and 600 MHz. Number of transistors: 9.5 million (0.25 micron process). L2 cache: 512 KB. System Bus Speed: 100 MHz. System Bus Width: 64 bit system bus. Addressable Memory: 64 Gigabytes. Intel's Pentium® III processors are built on 8-inch wafers. The Pentium® III processor features 70 new instructions--Internet Streaming SIMD extensions-- that dramatically enhance the performance of advanced imaging, 3-D, streaming audio, video and speech recognition applications. It was designed to significantly enhance Internet experiences, allowing users to do such things as browse through realistic online museums and stores and download high-quality video. The processor incorporates 9.5 million transistors, and was introduced using 0.25-micron technology. Introduced: Feb. 26, 1999 (450, 500 MHz), May 17, 1999 (550 MHz), Aug. 2, 1999 (600 MHz).