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Chapter 6 Integrated Graphics Subsystem
6.2 FUNCTIONAL DESCRIPTION
The NVidia NForce 220 chipset includes a graphics processing unit (GPU) integrated into the
integrated graphics processor (IGP) component (Figure 6-1). The graphics controller can directly
drive an external, analog multi-scan monitor at resolutions up to and including 1920 x 1440
pixels. The GPU includes a memory management feature that allocates portions of system
memory for use as the frame buffer and for storing textures and 3D effects.
These systems may be upgraded by installing a separate AGP graphics card in the AGP slot,
which disables the onboard IGC.
Memory
Bus
AGP I/F
DDR SDRAM
System
Memory
AGP Bus
RGB
AGP Slot
Described in Chapter 4
Described in Chapter 3
Hyper Transport Link
FSB
I/F
SDRAM
Controller
Graphics
Processing
Unit
Monitor
IGP
Figure 6-1. IGP-Based Graphics, Block diagram
The GPU is based on the NVidia GeForce-class of graphics controller and includes the following
features:
♦ Transform and lighting engines.
♦ Per-pixel shading rasterizer.
♦ 256-bit 2D 3D accelerator.
♦ Dual-pixel pipeline with full-speed processing of two textures per pixel
♦ Analog monitor resolution support up to 1920 x 1440
Compaq D315 and hp d325 Personal Computers
Featuring the AMD Athlon XP Processor
Second Edition - April 2003
6-2