Pentium III

Pentium III
General information
Launched	February 28, 1999
Discontinued	April 23, 2004 (for desktop units); May 18, 2007 (for mobile units)
Marketed by	Intel
Designed by	Intel
Common manufacturer	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
Extensions	MMX, SSE;
Physical specifications
Transistors	Katmai: 9.5 million; Coppermine: 28 million; Tualatin: 47 million;
Cores	1;
Sockets	Slot 1; Socket 370; Socket 495 (mobile); Socket 479 (mobile);
Products, models, variants
Core names	Katmai (desktop only); Coppermine; Coppermine T (desktop only); Tualatin;
Variant	Celeron;
History
Predecessor	Pentium II
Successor	Pentium 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]

^ ^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.
^ 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.

[p3discon-1] "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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