Pentium® III Processor for the SC242 at 450 MHz to 733 MHz
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)
Table 1. Processor Identification
Core
Frequency
(MHz)
System Bus
Frequency
(MHz)
L2 Cache Size
(Kbytes)
1
Processor
L2 Cache Type
CPUID
450
500
450
500
533
533
550
550
600
600
600
600
650
667
700
733
100
100
133
133
100
100
100
133
100
133
100
133
100
133
512
512
512
256
512
256
512
512
256
256
256
256
256
256
Discrete
Discrete
Discrete
067xh
067xh
067xh
068xh
067xh
068xh
067xh
067xh
068xh
068xh
068xh
068xh
068xh
068xh
533B
533EB
550
2
ATC
Discrete
2
550E
600
ATC
Discrete
Discrete
600B
600E
600EB
650
2
ATC
2
ATC
2
ATC
2
667
ATC
2
700
ATC
2
733
ATC
NOTES:
®
1. Refer to the 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.
1.2
Related Documents
The reader of this specification should also be familiar with material and concepts in the
documents listed in Table 2. These documents, and a complete list of Pentium III processor
reference material, can be found on the Intel Developers’ Insight web site located at
http://developer.intel.com.
Datasheet
11
INTEL [ INTEL ]
