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The Pentium III Hits 1 GHz

Intel's 15 Most Unforgettable x86 CPUs

The Pentium III Coppermine was the first commercial x86 processor from Intel to attain a clock speed of 1 GHz; a 1.13 GHz version was even released, but was quickly taken off the market because it was unstable. This new version of the Pentium III improved the Level 2 cache—now on-die. It was faster than the 512 KB external cache on the first model and was touted as a feature able to speed up the Internet experience. It was released in three versions: server (Xeon), entry-level (Celeron), and mobile (with the first version of SpeedStep).

Intel Pentium III
Code name Coppermine
Date released 1999
Architecture 32 bits
Data bus 64 bits
Address bus 32 bits
Maximum memory 4 GB
L1 cache 16 KB + 16 KB
L2 cache internal, 256 KB (CPU frequency)
Clock frequency 500–1,133 MHz
FSB 100-133 MHz
FPU built in
Fabrication process 180 nm
Number of transistors 28.1 million
Power consumption 25-35 W
Voltage 1.6 V, 1.8 V
Die surface area 106 mm²
Connector Slot 1-Socket 370 FCPGA

A slightly improved version (Tualatin), with more L2 cache (512 KB) and centering on a 130 nm process, was released in 2002. Essentially intended for servers (PIII-S) and mobile devices, it was less common in consumer-level machines.

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