Celeron Coppermine 128 with 600 MHz (FC-PGA package)
Backside of a Celeron Coppermine 128, 600 MHz
The next generation Celeron was the Coppermine-128 (sometimes known as the "Celeron II"). These were a derivative of Intel's Coppermine Pentium III and were released on March 29, 2000.[8] Like the Mendocino, the Celeron-128 used 128 KiB of on-chip L2 cache and was (initially) restricted to a 66 MHz bus speed, but the big news was the addition of SSE instructions, due to the new Coppermine core. Other than half the L2 cache (128 KiB instead of 256 KiB) and a slower FSB (66 to 100 MHz instead of 100 to 133 MHz), the Coppermine Celeron was identical to the Coppermine Pentium III.
All Coppermine-128s were produced in the same FCPGA Socket 370 format that most Coppermine Pentium III CPUs used. These Celeron processors began at 533 MHz and continued through 566, 600, 633, 666, 700, 733, and 766 MHz. Because of the limitations of the 66 MHz bus, there were diminishing returns on performance as clock rate increased. On January 3, 2001, Intel switched to a 100 MHz bus with the launch of the 800 MHz Celeron, resulting in a significant performance-per-clock improvement.[9]
All Celeron-128 CPUs from 800 MHz and faster use the 100 MHz front side bus. Various models were made at 800, 850, 900, 950, 1000, and 1100 MHz.
In Intel's "Family/Model/Stepping" scheme, Coppermine Celerons and Pentium IIIs are family 6, model 8 and their Intel product code is 80526.
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