Chapter 3 Processor/Memory Subsystem; Introduction; Figure 3-1. Processor /Memory - Compaq Deskpro EXS Technical Reference Manual

Chapter 3
PROCESSOR/
MEMORY SUBSYSTEM
3.

Chapter 3 PROCESSOR/MEMORY SUBSYSTEM

3.1

INTRODUCTION

This chapter describes the processor/memory subsystem of Compaq Deskpro Personal Computers
featuring the Pentium 4 processor. These systems feature the Pentium 4 processor and the 850
chipset (Figure 3-1). The 82850 MCH component of the 850 chipset supports two Direct Rambus
channels, each channel accommodating one or two RIMMs.
Pentium 4
Processor
400-MHz
64-Bit FSB
FSB I/F
AGP
I/F
Hub I/F
Will be populated with optional RIMM or CRIMM
Covered in Chapter 6
Covered in Chapter 4
Figure 3–1. Processor/Memory Subsystem Architecture
This chapter includes the following topics:
♦
Pentium 4 processor [3.2]
♦
Memory subsystem [3.3]
♦
Subsystem configuration {3.4]
Cntl
Rambus
Channel 1 /16
Rambus
82850
Rambus
Cntlr.
MCH
Channel 2 /16
Compaq Deskpro EXS and Workstation 300 Personal Computers
First Edition - December 2000
System Memory
XMM1 XMM2
RIMM
RIMM
Socket
In
Socket
page 3-2
page 3-5
page 3-8
Featuring the Intel Pentium 4 Processor
Technical Reference Guide
XMM4
XMM3
RIMM
RIMM
Socket
In
Socket
3-1