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Technical Reference Guide
Compaq Deskpro EXS and Workstation 300 Personal Computers
Featuring the Intel Pentium 4 Processor
First Edition - December 2000
3-1
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.
Figure 3–1. Processor/Memory Subsystem Architecture
This chapter includes the following topics:
♦ Pentium 4 processor [3.2] page 3-2
♦ Memory subsystem [3.3] page 3-5
♦ Subsystem configuration {3.4] page 3-8
Pentium 4
Processor
400-MHz
64-Bit FSB
Cntl
Rambus
Channel 1 /16
System Memory
RIMM
In
Socket
XMM1
XMM2
RIMM
Socket
82850
MCH
FSB I/F
AGP
I/F
Rambus
Cntlr.
Hub I/F
Will be populated with optional RIMM or CRIMM
Covered in Chapter 6
Covered in Chapter 4
RIMM
In
Socket
XMM3
XMM4
RIMM
Socket
Rambus
Channel 2 /16