Integrated Graphics Subsystem

6.2 Functional Description

The Intel Q45 GMCH component includes an Intel integrated Graphics Media Accelerator (GMA) 4500 controller (Figure 6-1). The GMA 4500 operates off the internal PCIe x16 bus and can directly drive an external, analog multi-scan monitor and a DisplayPort-compatible digital monitor simultaneously. The GMA 4500 includes a memory management feature that allocates portions of system memory for use as the frame buffer and for storing textures and 3D effects.

 

 

 

 

 

 

 

 

 

 

Q45 GMCH

Analog

RGB

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Monitor

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

GMA 4500

 

 

SDRAM

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Controller

 

Digital

DisplayPort

 

 

 

 

 

Controller

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Monitor

 

 

 

 

 

Switch

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PCIe x16 Graphics slot [1]

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PCIe data

 

ICH10

 

 

 

 

 

 

 

PCIe I/F

 

 

 

 

PCIe x4/x16 slot [1]

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NOTE: [1] SFF and CMT form factors only.

Figure 6-1. Q45-based Graphics, Block diagram

The GMA 4500 provides the following features:

DDR2

SDRAM (System

Memory)

Rapid pixel and texel rendering using four pipelines that allow 2D and 3D operations to overlap, speeding up visual effects, reducing the amount of memory for texture storage

Zone rendering for optimizing 3D drawing, eliminating the need for local graphics memory by reducing the bandwidth

Dynamic video memory allocation, where the amount of memory required by the application is acquired (or released) by the controller

Intelligent memory management allowing tiled memory addressing, deep display buffering, and dynamic data management

400-MHz core engine

350-MHz 24-bit RAMDAC

2D engine supporting GDI+ and alpha stretch blithering up to 2048 x 1536 w/32-bit color @ 75 Hz refresh (QVGA)

3D engine supporting Z-bias and up to 1600 x 1200 w/32-bit color @ 85 hz refresh

 

6-2

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Technical Reference Guide