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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.
Monitor
Connector
DDR SDRAM
System
Memory
Memory
Controller
IGP
RGB
VSync
HSync
3D
Engine
RAM
DAC A
Pipelined
Processor
2D
Engine
Graphics Processing Unit
Difference Matrix
Feature D315 d325
NVidia controller type GeForce2 MX GeForce4 MX
Pipeline performance 350 Mpixels/sec
700 texels fill rate
380 Mpixels/sec
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
Featuring the AMD Athlon XP Processor
Second Edition - April 2003
6-3