Intel ® 845G Chipset; Intel 845G Graphics Subsystem - Intel D845GRG Using Manual

Technical Product Specification for Intel Desktop Boards using the Intel 845G Chipset
1.7 Intel ® 845G Chipset
The Intel 845G chipset consists of the following devices:
•
Intel 82845G Graphics and Memory Controller Hub (GMCH) with Accelerated Hub
Architecture (AHA) bus
•
Intel 82801DB I/O Controller Hub (ICH4) with AHA bus
•
4 Mbit Firmware Hub (FWH)
The GMCH is a centralized controller for the system bus, the memory bus, the AGP bus, and the
Accelerated Hub Architecture interface. The ICH4 is a centralized controller for the board's I/O
paths. The FWH provides the nonvolatile storage of the BIOS.
For information about
The Intel 845G chipset
Resources used by the chipset

1.7.1 Intel 845G Graphics Subsystem

The Intel 845G chipset contains two separate, mutually exclusive graphics options. Either the
Intel Extreme Graphics controller (contained within the 82845G GMCH) is used, or an AGP
add-in card can be used. When an AGP add-in card is installed, the Intel Extreme Graphics
controller is disabled.
®
1.7.1.1 Intel Extreme Graphics Controller
The Intel Extreme Graphics controller features the following:
•
Integrated graphics controller
 32 bpp (Bits Per Pixel) graphics engine
 200 MHz core frequency
 256-bit internal data path for 2-D and 3-D graphics
 Motion video acceleration
•
3-D graphics visual and texturing enhancement
•
Display
 Integrated 24-bit 350 MHz RAMDAC
 DDC2B compliant interface
•
Video
 Dual monitor synchronous display
 Hardware motion compensation for software MPEG2 decode
 Two multiplexed DVO port interfaces with 165 MHz pixel clocks using an AGP Digital
Display (ADD) card
•
Dynamic Video Memory Technology (DVMT) support up to 64 MB (driver dependent)
For information about
DVMT
20
Refer to
http://developer.intel.com
Chapter 2
Refer to
Section 1.7.1.2, page 24