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Chapter 3 Processor/Memory Subsystem
Compaq Deskpro EN Series of Personal Computers
Desktop and Minitower Form Factors
Third Edition - September 1998
3-4
3.2.1.2 Celeron Processor
Select systems are shipped with the Intel Celeron processor. The Celeron processor (Figure 3-3)
uses a CPU/FPU core that is functionally the same as that of the Pentium II described previously
and provides the same level of branch prediction, math co-processing, MMX support, and L1
cache operation. Processing and Host bus speed ratios follow those of the Pentium II processors
and are set and determined with the same methods. Note that the Celeron 300 does not include
an L2 cache. The L2 cache of the Celeron 300A and 333 operates at processor (CPU) speed.
[1] Not present on Celeron 266 or 300 processors.
Figure 3–3.
Celeron Processor Internal Architecture
Like the Pentium II processor, the Celeron processor is software-compatible with earlier
generation Pentium MMX, Pentium, and x86 processors.
NOTE:
Later versions of the Celeron processor require updated BIOS firmware. Refer
to section 3.2.2 for upgrading information.
Celeron Processor
CPU
Branch
Prediction
FPU
32-KB
L1
Cache
128-KB
L2
Cache [1]
FSB
I/F
Core processin
g
speed
Host bus speed