Intel D845GBV Technical Product Specification for Intel Desktop Boards using t - Page 20

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 Refer to http://developer.intel.com Chapter 2 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 Refer to Section 1.7.1.2, page 24 20