Intel's processor history: the path from the Intel 4004 to the Pentium 4

Intel's processor history: the path from the Intel 4004 to the Pentium 4

Continuation: The Celeron

With the Celeron 766, Intel had reached a limit that made an increase in the FSB inevitable. The multipliers of the Celeron had reached their end with 11.5 x 66 MHz = 766 MHz and the CPU performance was significantly reduced by the slow FSB. That's why Intel increased the FSB from 66 to 100 MHz from the Celeron 800 onwards.

Intel Celeron
Intel Celeron FC-PGA

From 1.2 GHz, the switch from Coppermine tothe Tualatin core of the L2 cache increased from 128 to 256KB, which again has a positive effect on performance. The 133 MHz front-side bus remained with the Celeron. It still had to get by with 100 MHz and continued to rely on the somewhat outdated Socket 370. In the meantime, Intel also offers the Celeron Tualatin from 1.0 GHz, although it was originally only introduced with 1.2 GHz.

Intel Celeron

In the course of the almost four years that the Celeron has under its belt, the manufacturing process has of course also been developed always improved. The Mendocino in PPGA format was still produced in 0.25 µm technology, while the Celeron with coppermine core is already produced in 0.18 µm and the current Celeron with Tualatin core in 0.13 µm technology.

The Celeron reached its peak with the new Tualatin core, which Intel also uses in the latest Pentium III CPUs. Unlike before, Intel is not cutting the L2 cache in the Celeron variant this time, but only the front-side bus, which, unlike the Pentium III, is not 133 MHz but only 100 MHz. In addition, Intel has also switched off the DPL unit in the Celeron Tualatin, but more on this in the Pentium III section.

All Celeron models at a glance
Clock frequency front-side Bus Multi L2-Cache L2-Cache-Clock Manufacturing Format 266 MHz 66 MHz 4.0 - - 0.35µm (Convington) SEPP 300 MHz 66 MHz 4.5 - - 0.35µm (Convington) SEPP 300 MHz (A) 66 MHz 4.5 128KB 300 MHz 0.25 µm (Mendocino) PPGA 333 MHz 66 MHz 5.0 128KB 333 MHz 0.25 µm (Mendocino) PPGA 366 MHz 66 MHz5.5 128KB 366 MHz 0.25µm (Mendocino) PPGA 400 MHz 66 MHz 6.0 128KB 400 MHz 0.25µm (Mendocino) PPGA 433 MHz 66 MHz 6.5 128KB 433 MHz 0.25µm (Mendocino) PPGA 466 MHz 66 MHz 7.0 128KB 466 MHz 0.25µm (Mendocino ) PPGA 500 MHz 66 MHz 7.5 128KB 500 MHz 0.25µm (Mendocino) PPGA 533 MHz 66 MHz 8.0 128KB 533 MHz 0.25µm (Mendocino) PPGA 533 MHz (A) 66 MHz 8.0 128KB 533 MHz 0.18µm (Coppermine) FC-PGA 566 MHz 66 MHz 8.5 128KB 566 MHz 0.18µm (Coppermine) FC-PGA 600 MHz 66 MHz 9.0 128KB 600 MHz 0.18µm (Coppermine) FC-PGA 633 MHz 66 MHz 9.5 128KB 633 MHz 0.18µm (Coppermine) FC-PGA 666 MHz 66 MHz 10.0 128KB 666 MHz 0.18µm (Coppermine) FC-PGA 700 MHz 66 MHz 10.5 128KB 700 MHz 0.18µm (Coppermine) FC-PG A 733 MHz 66 MHz 11.0 128KB 733 MHz 0.18µm (Coppermine) FC-PGA 766 MHz 66 MHz 11.5 128KB 766 MHz 0.18µm (Coppermine) FC-PGA 800 MHz 100 MHz 8.0 128KB 800 MHz 0.18µm (Coppermine) FC-PGA 850 MHz 100 MHz 8.5 128KB 850 MHz 0.18µm (Coppermine) FC-PGA 900 MHz 100 MHz 9.0 128KB 900 MHz 0.18µm (Coppermine) FC-PGA 950 MHz 100 MHz 9.5 128KB 950 MHz 0.18µm (Coppermine) FC-PGA 1.0 GHz 100 MHz 10.0 128KB 1.0 GHz 0.18µm (Coppermine) FC-PGA 1.1 GHz 100 MHz 11.0 128KB 1.1 GHz 0.18µm (Coppermine) FC-PGA 1.2 GHz 100 MHz 12.0 256KB 1.2 GHz 0.13µm (Tualatin) FC-PGA 1.3 GHz 100 MHz 13.0 256KB 1.3 GHz 0.13µm (Tualatin) FC-PGA

Intel stayed true to its motto and thus donated the Celeron slimmed down again and againPentium II/III CPUs. That's why we're now taking a closer look at the Pentium III and only then go into more detail about some of the features that the Celeron also has.

On the next page: 1999: The Pentium III