Technical Reference Guide

2.4.2 CHIPSET

The D315 model uses a NVidia NForce 220 chipset while the D325 model uses the NVidia NForce2 chipset. Table 2-3 provides a comparison of the two chipset types.

Table 2-3.Chipset Functions

Table 2-3.NVidia Chipset Comparison

Component

NForce 220

NForce 2 420

North Bridge

IGP-64

IGP-128

FSB speed (max)

266-MHz

333-MHz

Memory Bandwidth (max)

64-bit

128-bit

Graphics Processing Unit

GeForce2 MX

GeForce4 MX

AGP Interface (max)

4X

8X

South Bridge

MCP

MCP-2

PCI bus I/F

Yes

Yes

LPC bus I/F

Yes

Yes

Two IDE UATA/100 controllers

Yes

Yes

AC Link controller

Yes

Yes

IRQ controller

Yes

Yes

Power management logic

Yes

Yes

Two USB 1.1 controllers

Yes

Yes

One USB 2.0 controller

No

Yes

NOTE:

Unless otherwise indicated, all functions are common to both chipsets.

2.4.3 SUPPORT COMPONENTS

Input/output functions not provided by the chipset are handled by other support components. Some of these components also provide “housekeeping” and various other functions as well. Table 2-4 shows the functions provided by the support components.

Table 2-4.Support Component Functions

 

Table 2-4.

 

Support Component Functions

Component Name

Function

LPC47B367 I/O Controller

Keyboard and pointing device I/F

 

Diskette I/F

 

Serial I/F (1)

 

Parallel I/F (1)

 

AGP, PCI reset generation

 

Interrupt (IRQ) serializer

 

Power button logic

 

GPIO ports

AD1885 (D315) or

Audio mixer

AD1981 (d325) Audio Codec

Digital-to-analog converter

 

Analog-to-digital converter

 

Analog I/O

 

6-channel audio support (AD1981 only)

Compaq D315 and hp d325 Personal Computers2-11

Featuring the AMD Athlon XP Processor

Second Edition - March 2003