The
Pentium III
The Pentium III (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. The brand's initial ...
from
Intel
Intel Corporation is an American multinational corporation and technology company headquartered in Santa Clara, California, Santa Clara, California. It is the world's largest semiconductor chip manufacturer by revenue, and is one of the devel ...
is a sixth-generation
CPU
A central processing unit (CPU), also called a central processor, main processor or just processor, is the electronic circuitry that executes instructions comprising a computer program. The CPU performs basic arithmetic, logic, controlling, and ...
targeted at the consumer market.
Desktop processors
"Katmai" (250 nm)
* 9.5 million transistors
* All models support:
MMX,
SSE
* The 'B' suffix denotes a 133 MHz FSB
* The '80525PYxxx512' number denotes an OEM CPU while the 'BX80525xxxx512' or 'BX80525xxxx512E' number denotes a boxed CPU
* The L2 cache is off-die and runs at 50% CPU speed.
"Coppermine" (180 nm)
* 28 million transistors
* All models support:
MMX,
SSE
* The 'B' suffix denotes a 133 MHz FSB
* The 'E' suffix denotes a processor with support for Intel's Advanced Transfer Cache
* The L2 cache runs at 100% CPU speed
"Coppermine T" (180 nm)
* All models support:
MMX,
SSE
* The L2 cache runs at 100% CPU speed
"Tualatin" (130 nm)
* All models support:
MMX,
SSE
* The 'S' suffix denotes the presence of 512 KB L2 cache and dual-processor capability.
* The Tualatin-class Pentium IIIs did not include the controversial Processor Serial Number feature that was present in the earlier Pentium IIIs
* The L2 cache runs at 100% CPU speed
* Tualatin (S) supports up to 4 GB of memory (PC133 MHz ECC SDRAM DIMM - 4x1GB)
Mobile processors
"Coppermine" (180 nm)
* All models support:
MMX,
SSE
"Tualatin" (130 nm)
* All models support:
MMX,
SSE
Videogame consoles
"Coppermine-128" (180 nm)

A custom
Coppermine-based Pentium III
The Pentium III (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. The brand's initial ...
version was developed for Microsoft's
Xbox
Xbox is a video gaming brand created and owned by Microsoft. The brand consists of five video game consoles, as well as applications (games), streaming services, an online service by the name of Xbox network, and the development arm by th ...
game console. The only significant change was that the chip lost half of its L2 cache, dropping it down to 128 KB. Unlike the
Celeron Coppermine-128 variant with the same size L2 cache, but reduced 4-way L2 cache associativity, Xbox's Coppermine core kept all of its 8-way L2 cache associativity from the Pentium III. This means that the Xbox CPU's L2 cache is more efficient than Celeron's. The Xbox CPU was manufactured onto the same Micro-PGA2 packaging as
notebook
A notebook (also known as a notepad, writing pad, drawing pad, or legal pad) is a book or stack of paper pages that are often ruled and used for purposes such as note-taking, journaling or other writing, drawing, or scrapbooking.
History
...
chips, but in a
BGA (ball grid array) format.
* All models support:
MMX,
SSE
* The L2 cache runs at 100% cpu speed
See also
*
List of Intel Pentium microprocessors
The Intel Pentium brand is a line of mainstream x86-architecture microprocessors from Intel. Processors branded Pentium Processor with MMX Technology (and referred to as Pentium MMX for brevity) are also listed here.
Desktop processors
P ...
References
External links
Intel Automated Relational Knowledgebase
{{Intel processors, p6
*Pentium 3
Intel Pentium 3