Compaq Deskpro Workstation AP230 - Celeron Processor; Figure 3-2. Celeron Processor; Table 3-1. Celeron Processor

Chapter 3 Processor/Memory Subsystem
Compaq Deskpro Personal Computers
Third Edition - April 2001
3-2
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-
KB secondary (L2) ECC cache. All internal functions, except for the front side bus interface (FSB
I/F), operate at processor 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. Such applications often
involve computing-intensive loops that can take up as much as 90 percent of the CPU’s execution
time. Using a parallel-processing technique called single-instruction multiple-data (SIMD), MMX
logic processes data 64 bits at a time. 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
Part
Marking
Core/L1/L2
Speed
Core Voltage
(VccP)
Max. Power
Consumption
Celeron 566 SL4PC 533 MHz 1.50 VDC 11.9 W
Celeron 600 [1] SL4PB 566 MHz 1.50 VDC 12.6 W
Celeron 633 SL4PA 633 MHz 1.65 VDC 17.0 W
Celeron 667 SL4P9 667 MHz 1.65 VDC 17.5 W
Celeron 700 SL4P8 700 MHz 1.65 VDC 18.3 W
Celeron 733 [1] SL4P7 733 MHz 1.65 VDC 19.1 W
Celeron 766 [1] SL4P6 766 MHz 1.65 VDC 20.0 W
NOTES:
FSB of all processors operates at 66 MHz.
Statistics are for C-step processors.
[1] Standard configuration processor
Celeron Processor
CPU
FPU
32-KB
L1
Cache
128-KB
L2
Cache
FSB
I/F
Core processin
g
speed Host bus speed