<processor, Intel> The microprocessor that was Intel Corporation'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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