Coppermine (microprocessor)
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| Produced | From early 1999 to 2003 |
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| Common manufacturer(s) |
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| Max. CPU clock rate | 450 MHz to 1.4 GHz |
| FSB speeds | 100 MHz to 133 MHz |
| Min. feature size | 0.25 µm to 0.13 µm |
| Instruction set | IA-32, MMX, SSE |
| Microarchitecture | P6 |
| Cores | 1 |
| Socket(s) | |
| Predecessor | Pentium II |
| Successor | Pentium 4, Xeon, Celeron, Pentium M |
| Core name(s) |
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The Pentium III (marketed as Intel Pentium III Processor, informally PIII, also stylized as Pentium !!! ) brand refers to Intel's 32-bit x86 desktop and mobile microprocessors based on the sixth-generation P6 microarchitecture introduced on February 26, 1999. The brand's initial processors were very similar to the earlier Pentium II-branded microprocessors. The most notable differences were the addition of the SSE instruction set (to accelerate floating point and parallel calculations), and the introduction of a controversial serial number embedded in the chip during the manufacturing process.
Similarly to the Pentium II it superseded, the Pentium III was also accompanied by the Celeron brand for lower-end versions, and the Xeon for high-end (server and workstation) derivatives. The Pentium III was eventually superseded by the Pentium 4, but its Tualatin core also served as the basis for the Pentium M CPUs, which used many ideas from the P6 microarchitecture. Subsequently, it was the Pentium M microarchitecture of Pentium M branded CPUs, and not the NetBurst found in Pentium 4 processors, that formed the basis for Intel's energy-efficient Core microarchitecture of CPUs branded Core 2, Pentium Dual-Core, Celeron (Core), and Xeon.
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