Line of desktop and mobile microprocessors produced by Intel
Pentium III
General information
Launched
February 28, 1999
Discontinued
April 23, 2004 (for desktop units) May 18, 2007 (for mobile units)[1]
Marketed by
Intel
Designed by
Intel
Common manufacturer(s)
Intel
Product code
Katmai: 80525
Coppermine: 80526
Coppermine T: 80533
Tualatin: 80530
Performance
Max. CPU clock rate
400 MHz to 1.4 GHz
FSB speeds
100 MT/s to 133 MT/s
Cache
L1 cache
32 KB (16 KB data + 16 KB instructions)
L2 cache
128–512 KB
Architecture and classification
Technology node
250 nm to 130 nm
Microarchitecture
P6
Instruction set
IA-32, MMX, SSE
Instructions
MMX, SSE
Physical specifications
Transistors
Katmai: 9.5 million
Coppermine: 28 million
Tualatin: 47 million
Cores
1
Socket(s)
Slot 1
Socket 370
Socket 495 (mobile)
Socket 479 (mobile)
Products, models, variants
Core name(s)
Katmai (desktop only)
Coppermine
Coppermine T (desktop only)
Tualatin
Variant(s)
Celeron
History
Predecessor(s)
Pentium II
Successor(s)
Pentium 4
Support status
Unsupported
The Pentium III[2] (marketed as Intel Pentium III Processor and Pentium !!!, 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. The Pentium III is also a single-core processor.
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]
^ ab"Product Change Notification #104109-00" (PDF). Intel. May 14, 2004. Archived from the original (PDF) on July 19, 2004. Retrieved October 14, 2019.
^Microprocessor Hall of Fame, Intel Corporation, archived from the original on April 6, 2008, retrieved August 11, 2007
^"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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