Compaq 850 manual Processor Memory Subsystem, Fsb I/F, Agp Mch, XMM1 XMM2 Rimm, XMM3 XMM4

Technical Reference Guide

Chapter 3

PROCESSOR/

MEMORY SUBSYSTEM

3.Chapter 3 PROCESSOR/MEMORY SUBSYSTEM

3.1INTRODUCTION

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		Cntl
64-Bit FSB
	FSB I/F
			Rambus
	82850
AGP
	MCH			Cntlr.
I/F
	Hub I/F

Rambus Channel 1 /16

Rambus Channel 2 /16

System Memory

XMM1 XMM2

RIMM	RIMM
In	Socket	XMM3	XMM4
Socket
		RIMM	RIMM
		In	Socket
		Socket

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]	page 3-2
♦	Memory subsystem [3.3]	page 3-5
♦	Subsystem configuration {3.4]	page 3-8

Compaq Deskpro EXS and Workstation 300 Personal Computers 3-1

Featuring the Intel Pentium 4 Processor

First Edition - December 2000