Technical Reference Guide

Figure 6-2 shows the block diagram of the graphics processing unit. The GPU includes 256-bit 2D and 3D engines that work with a multi-pipelined processor. The processor provides hardware- assisted MPEG-2 decoding for DVD and HDTV video playback in resolutions up to 1280 x 720.

 

 

 

 

IGP

 

 

 

 

Graphics Processing Unit

 

 

 

 

 

2D

3D

 

 

 

 

 

Engine

Engine

 

 

 

HSync

 

 

 

 

 

Monitor

VSync

RAM

Pipelined

Memory

DDR SDRAM

Connector

 

System

RGB

DAC A

Processor

Controller

Memory

 

 

 

 

 

Difference Matrix

Feature

D315

d325

NVidia controller type

GeForce2 MX

GeForce4 MX

Pipeline performance

350 Mpixels/sec

380 Mpixels/sec

 

700 texels fill rate

760 texels fill rate

Transform & lighting engine rate

20 Mtriangeles/sec

24 Mtriangles/sec

Figure 6-2.IGP Graphics Controller Block diagram and Difference Matrix

The GPU works with the SDRAM Memory Controller to use a portion of system memory for instructions, textures, and frame (display) buffering. The SDRAM Memory Controller dynamically allocates display and texture memory amounts according to the needs of the application running on the system.

Compaq D315 and hp d325 Personal Computers 6-3

Featuring the AMD Athlon XP Processor

Second Edition - April 2003