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Technical Reference Guide
Compaq iPAQ Family of Internet Devices
First Edition - March 2000
3-3
3.2.2 PENTIUM III PROCESSOR
The Pentium III processor’s architecture (Figure 3-3) includes the same core functionality as
described previously for the Celeron processor but includes a larger L2 cache and additional
processing features.
Figure 3–3.
Pentium III Processor Internal Architecture
Table 3–2.
Pentium III Processor Statistical Comparison
Table 3-2.
Pentium III Processor Statistical Comparison
Processor
CPU/L1
Speed
L2
Size / Speed
Core
Voltage
FSB
Speed
Pentium III 500E 500 MHz 256 KB @ 500 MHz 1.60 VDC 100 MHz
Pentium III 533 533 MHz 512 KB @ 266 MHz 2.00 VDC 100 MHz
Pentium III 533B 533 MHz 512 KB @ 266 MHz 2.05 VDC 133 MHz
Pentium III 533EB 533 MHz 256 KB @ 533 MHz 1.65 VDC 133 MHz
Pentium III 550 550 MHz 512 KB @ 275 MHz 2.00 VDC 100 MHz
Pentium III 550E 550 MHz 256 KB @ 550 MHz 1.60 VDC 100 MHz
Pentium III 600 600 MHz 512 KB @ 300 MHz 2.05 VDC 100 MHz
Pentium III 600B 600 MHz 512 KB @ 300 MHz 2.05 VDC 133 MHz
Pentium III 600E 600 MHz 256 KB @ 600 MHz 1.65 VDC 100 MHz
Pentium III 600EB 600 MHz 256 KB @ 600 MHz 1.65 VDC 133 MHz
Pentium III 667 667 MHz 256 KB @ 667 MHz 1.65 VDC 133 MHz
Pentium III 700 700 MHz 256 KB @ 700 MHz 1.65 VDC 100 MHz
Pentium III 733 733 MHz 256 KB @ 733 MHz 1.65 VDC 133 MHz
The Pentium III processor is software-compatible with Celeron, Pentium II, Pentium MMX,
Pentium, and x86 processors. The Pentium III processor also features 70 FPU-based streaming
SIMD extensions (SSE) that, when implemented by appropriate software, can enhance 3D
transforming and speech processing operations. Operating system requirements for SSE support
are as follows:
Operating System Level of SSE Support
Windows 95 No SSE support
Windows 98, OSR0 SSE support though ISV and OpenGL 6.1 applications only
Windows 98, OSR1 SSE support though ISV, OpenGL, and DirectX applications
Windows 2000 SSE support with ISV, OpenGL, and DirectX applications
Windows NT 4.0 SSE support requires driver and Service Pack 4 (SP5 recommended)
Full processin
g
speed Host bus speed
or
Pentium III 500E
CPU
FPU
32-KB
L1
Cache
256-KB
L2
Cache
FSB
I/F