Datasheet

Datasheet 11
Introduction
1.1.2 Processor Naming Convention
A letter(s) is added to certain processors (e.g., 600B MHz) when the core frequency alone may not
uniquely identify the processor. Below is a summary what the letter means as well as a table listing
all Pentium III processors currently available.
• “B” — 133 MHz System Bus Frequency
• “E” — Processor with “Advanced Transfer Cache” (CPUID=068xh)
NOTES:
1. Refer to the Intel
®
Pentium
®
III Processor Specification Update for the exact CPUID for each processor.
2. ATC = Advanced Transfer Cache. ATC is an L2 Cache integrated on the same die as the processor core.
With ATC, the interface between the processor core and L2 Cache is 256-bits wide, runs at the same
frequency as the processor core and has enhanced buffering.
Table 1. Processor Identification
Processor
Core
Frequency
(MHz)
System Bus
Frequency
(MHz)
L2 Cache Size
(Kbytes)
L2 Cache Type CPUID
1
450 450 100 512 Discrete 067xh
500 500 100 512 Discrete 067xh
533B 533 133 512 Discrete 067xh
533EB 533 133 256 ATC
2
068xh
550 550 100 512 Discrete 067xh
550E 550 100 256 ATC
2
068xh
600 600 100 512 Discrete 067xh
600B 600 133 512 Discrete 067xh
600E 600 100 256 ATC
2
068xh
600EB 600 133 256 ATC
2
068xh
650 650 100 256 ATC
2
068xh
667 667 133 256 ATC
2
068xh
700 700 100 256 ATC
2
068xh
733 733 133 256 ATC
2
068xh
750 750 100 256 ATC
2
068xh
800 800 100 256 ATC
2
068xh
800EB 800 133 256 ATC
2
068xh
850 850 100 256 ATC
2
068xh
866 866 133 256 ATC
2
068xh
933 933 133 256 ATC
2
068xh
1.0 GHz 1000 100 256 ATC
2
068xh
1.0B GHz 1000 133 256 ATC
2
068xh