Compaq 850 TABLE OF CONTENTS

Technical Reference Guide
Compaq Deskpro EXS and Workstation 300 Personal Computers
Featuring the Intel Pentium 4 Processor
First Edition - December 2000
iii
TABLE OF CONTENTS
CHAPTER 1 INTRODUCTION..................................................................................................................
1.1 ABOUT THIS GUIDE................................................................................................................ 1-1
1.1.1 USING T HIS GUIDE ..........................................................................................................1-1
1.1.2 ADDITIONAL INFORMATION SOURCES .....................................................................1-1
1.2 MODEL NUMBERING CONVENTION................................................................................... 1-1
1.3 NOTATIONAL CONVENTIONS.............................................................................................. 1-2
1.3.1 VALUES ............................................................................................................................. 1-2
1.3.2 RANGES ............................................................................................................................. 1-2
1.3.3 SIGNAL LABELS............................................................................................................... 1-2
1.3.4 REGISTER NOT ATION AND USAGE .............................................................................1-2
1.3.5 BIT NOTATION................................................................................................................. 1-2
1.4 COMMON ACRONYMS AND ABBREVIATIONS.................................................................1-3
CHAPTER 2 SYSTEM OVERVIEW..........................................................................................................
2.1 INTRODUCTION....................................................................................................................... 2-1
2.2 FEATURES AND OPTIONS......................................................................................................2-2
2.2.1 STANDARD FEATURES................................................................................................... 2-2
2.2.2 OPTIONS............................................................................................................................ 2-3
2.3 MECHANICAL DESIGN........................................................................................................... 2-4
2.3.1 CABINET LAYOUTS ........................................................................................................ 2-4
2.3.2 CHASSIS LAYOUT............................................................................................................ 2-6
2.3.3 BOARD LAYOUT ..............................................................................................................2-7
2.4 SYSTEM ARCHITECTURE...................................................................................................... 2-8
2.4.1 PENT IUM 4 PROCESSOR...............................................................................................2-10
2.4.2 CHIPSET........................................................................................................................... 2-11
2.4.3 SUPPORT COMPONENT S..............................................................................................2-11
2.4.4 SYSTEM MEMORY......................................................................................................... 2-12
2.4.5 MASS STORAGE .............................................................................................................2-1 2
2.4.6 SERIAL, PARALLEL INTERFACES ..............................................................................2-12
2.4.7 UNIVERSAL SERIAL BUS INTERFACE ...................................................................... 2-12
2.4.8 GRAPHICS SUBSYSTEM ...............................................................................................2-13
2.4.9 AUDIO SUBSYSTEM ......................................................................................................2-14
2.5 SPECIFICATIONS................................................................................................................... 2-14
CHAPTER 3 PROCESSOR/MEMORY SUBSYSTEM............................................................................
3.1 INTRODUCTION....................................................................................................................... 3-1
3.2 PENTIUM 4 PROCESSOR.........................................................................................................3-2
3.2.1 PROCESSOR OVERVIEW ................................................................................................ 3-2
3.2.2 PROCESSOR UPGRADING ..............................................................................................3-4
3.3 MEMORY SUBSYSTEM...........................................................................................................3-5
3.3.1 RAMBUS ATTRIBUTES ...................................................................................................3-6
3.3.2 RAMBUS CHANNEL TRANSACTIONS ......................................................................... 3-7
3.3.3 RDRAM POWER MANAGEMENT ..................................................................................3-8
3.3.4 RDRAM CONFIGURATION/CONTROL .........................................................................3-8
3.4 SUBSYSTEM CONFIGURATION.......................................................................................... 3-10