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Pentium III

Pentium III
General information
LaunchedFebruary 28, 1999
DiscontinuedApril 23, 2004 (for desktop units)
May 18, 2007 (for mobile units)[1]
Marketed byIntel
Designed byIntel
Common manufacturer
  • Intel
Product code
  • Katmai: 80525
  • Coppermine: 80526
  • Coppermine T: 80533
  • Tualatin: 80530
Performance
Max. CPU clock rate400 MHz to 1.4 GHz
FSB speeds100 MT/s to 133 MT/s
Cache
L1 cache32 KB (16 KB data + 16 KB instructions)
L2 cache128–512 KB
Architecture and classification
Technology node250 nm to 130 nm
MicroarchitectureP6
Instruction setIA-32
Extensions
Physical specifications
Transistors
  • Katmai: 9.5 million
  • Coppermine: 28 million
  • Tualatin: 47 million
Cores
  • 1
Sockets
Products, models, variants
Core names
  • Katmai (desktop only)
  • Coppermine
  • Coppermine T (desktop only)
  • Tualatin
Variant
History
PredecessorPentium II
SuccessorPentium 4
Support status
Unsupported

The Pentium III[2] (marketed as Intel Pentium III Processor, informally PIII or P3) brand refers to Intel's 32-bit x86 desktop and mobile CPUs based on the sixth-generation P6 microarchitecture introduced on February 28, 1999.[citation needed] The brand's initial processors were very similar to the earlier Pentium II-branded processors. The most notable differences were the addition of the Streaming SIMD Extensions (SSE) instruction set (to accelerate floating point and parallel calculations), and the introduction of a controversial serial number embedded in the chip during manufacturing.

Even after the release of the Pentium 4 in late 2000, the Pentium III continued to be produced with new models introduced up until early 2003. They were then discontinued in April 2004 for desktop units[3] and May 2007 for mobile units.[1]

  1. ^ a b "Product Change Notification #104109-00" (PDF). Intel. May 14, 2004. Archived from the original (PDF) on July 19, 2004. Retrieved October 14, 2019.
  2. ^ Microprocessor Hall of Fame, Intel Corporation, archived from the original on April 6, 2008, retrieved August 11, 2007
  3. ^ "Product Change Notification #102839-00" (PDF). Intel. October 14, 2002. Archived from the original (PDF) on March 22, 2003. Retrieved October 14, 2019.

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