Intel III 450 MHz 80525PY450512 Data Sheet
Product codes
80525PY450512
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.
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.
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