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However, I would like to offer you a table with all the markings and corresponding specifications of Intel’s desktop processors, just in case:
Brand | Processor number | Core | Clock frequency | Bus frequency | Cache memory | Intel Technologies |
Pentium 4 | 720 | Prescott | 3.73GHz | 1066MHz | 2MB L2 | HT |
580 | Prescott | 4.0GHz | 800MHz | 1MB L2 | HT | |
570 | Prescott | 3.8GHz | 800MHz | 1MB L2 | HT | |
560 | Prescott | 3.6GHz | 800MHz | 1MB L2 | HT | |
550 | Prescott | 3.4GHz | 800MHz | 1MB L2 | HT | |
540 | Prescott | 3.2GHz | 800MHz | 1MB L2 | HT | |
530 | Prescott | 3.0GHz | 800MHz | 1MB L2 | HT | |
520 | Prescott | 2.8GHz | 800MHz | 1MB L2 | HT | |
Celeron D | 350 | Prescott-256 | 3.2GHz | 533MHz | 256KB L2 |
|
345 | Prescott-256 | 3.06GHz | 533MHz | 256KB L2 |
| |
340 | Prescott-256 | 2.93GHz | 533MHz | 256KB L2 |
| |
335 | Prescott-256 | 2.8GHz | 533MHz | 256KB L2 |
| |
330 | Prescott-256 | 2.66GHz | 533MHz | 256KB L2 |
| |
325 | Prescott-256 | 2.53GHz | 533MHz | 256KB L2 |
|
Celeron processors, unlike Celeron D, will retain the frequency marking. This fact is going to become one more external difference of the new budget CPUs from Intel.
The exterior of the new Celeron D is very similar to that of the old one. Look:
Intel Celeron D on the left, Intel Celeron on the right
As we see, there is no mention about the new rating on the CPU itself, only the technical specifications are listed. The reverse side of the new Celeron D carries all electronic components typical of the Prescott based processors. The info we get from the diagnostic utilities about this CPU looks as follows:
As you can notice, Celeron D is still based on the old Prescott core with C0 core stepping. The new D0 stepping is now used only in the newest Pentium 4 processors designed for the LGA775 form-factor. As you remember, C0 core features slightly worse frequency potential and higher heat dissipation. However, Celeron D with smaller L2 cache and 2.8GHz core clock frequency this is not that critical. Therefore, Celeron D will hardly ever move to the new core stepping at all.
