Pentium III

microprocessor, Intel The microprocessor that was IntelCorporation's successor to the Pentium II, introduced in

1999 with a 500 MHz clock rate. The Pentim III is very

similar to the Pentium II in architecture. Its external bus

can be clocked at 100 or 133 MHz, it can have up to 512 KB

of secondary cache, and it comes in various packages

including SECC2 and FC-PGA.

The Pentium III has a P6 Dynamic Execution

microarchitecture, a multi-transaction system bus, and

MMX, like the Pentium II. It adds Dual Independent Bus

(DIB) Architecture, the Intel Processor Serial Number,

Internet Streaming SIMD Extensions, 70 new instructions.

Some versions also include an Advanced Transfer Cache and

Advanced System Buffering.

When Intel released a 1.13 GHz version of the Pentium III

processor using a 0.18 micron fabrication process on

2000-07-31, it was the world's highest performance

microprocessor for PCs.

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(2000-10-05)