Compaq Evo D500 User Manual

Chapter 3 Processor/Memory Subsystem
3.2 PROCESSOR
The Compaq Deskpro EN is shipped with either a Celeron or Pentium III processor. The Compaq
Deskpro Workstation AP230 is shipped with a Pentium III processor.
3.2.1 CELERON PROCESSOR
The Celeron processor (Figure 3-2) uses a dual-ALU CPU with branch prediction and MMX
support, floating point unit (FPU) for math coprocessing, a 32-KB primary (L1) cache, and a 128-
or 256-KB secondary (L2) ECC cache. All internal functions, except for the front side bus
interface (FSB I/F), operate at processor speed.
FSB
I/F
128-
or 256-KB
L2
Cache
32-KB
L1
Cache
FPU
CPU
Celeron Processor
Core processing speed Host bus speed
Figure 3–2. Celeron Processor Internal Architecture
The Celeron processor is software-compatible with earlier generation Pentium II, Pentium MMX,
Pentium, and x86 processors. The MMX support provided by the Celeron consists of 57 special
instructions for accelerating multimedia communications applications. Specific applications that
can benefit from MMX technology include 2D/3D graphics, audio, speech recognition, video
codecs, and data compression. These systems support the Celeron processors listed in the
following table:
Table 3–1. Celeron Processor Statistical Comparison
Table 3-1.
Celeron Processor Statistical Comparison
Processor
L2 Cache
Size
FSB
Speed
Core Voltage
(VccP)
System Bd.
Support
Celeron 566-600 MHz 128 KB 66 MHz 1.50 VDC [1]
Celeron 633-766MHz 128 KB 66 MHz 1.65 VDC [1]
Celeron 800 MHz-1.10 GHz 128 KB 100 MHz 1.70 VDC [2]
Celeron 1.2 GHz 256 KB 100 MHz 1.475 VDC [2]
Celeron 1.3 GHz 256 KB 100 MHz 1.50 VDC [2]
NOTES:
[1] Supported by all system board PCA#s.
[2] Supported by system board PCA#s 011305, 011308, 011311 only.
Compaq Deskpro and Evo Personal Computers
Featuring Intel Celeron and Pentium III Processors
Fifth Edition - March 2002
3-2

Compaq Evo D500 Specifications

General

Brand	Compaq
Model	Evo D500
Category	Desktop
Language	English