![](http://datasheet.mmic.net.cn/340000/82865G_datasheet_16452471/82865G_17.png)
18
Intel
82865G/82865GV GMCH Datasheet
Introduction
NOTE:
For additional related documents, refer to the
Intel
865G//865GV865PE/865P Chipset Platform Design
Guide
.
1.3
Intel
865G Chipset System Overview
Figure 1
shows an example block diagram of an 865G chipset-based platform. The 865G chipset is
designed for use in a desktop system based on a Pentium 4 processor with 512-KB L2 cache on
0.13 micron process and the Pentium 4 processor on 90 nm process. The processor interface
supports the Pentium 4 processor subset of the Extended Mode of the Scalable Bus Protocol. The
GMCH provides the processor interface, system memory interface, CSA interface, AGP interface,
hub interface, and additional interfaces. The GMCH contains and integrated graphics device.
The 865G chipset platform supports either an integrated graphics device (IGD) or an external
graphics device on AGP. The IGD has 3D, 2D, and video capabilities. The IGD also has two
multiplexed Intel DVO ports to support DVO devices. The GMCH’s AGP interface supports
1X/4X/8X AGP data transfers and 4X/8X AGP Fast Writes, as defined in the
Accelerated Graphics
Port Interface Specification, Revision 3.0
.
The GMCH provides a Communications Streaming Architecture (CSA) Interface that connects the
GMCH to a Gigabit Ethernet (GbE) controller.
The 865G chipset platform supports 4 GB of system memory and has a maximum bandwidth of
6.4 GB/s using DDR400 in dual-channel mode.
The 82801EB ICH5 integrates an Ultra ATA 100 controller, two Serial ATA host controllers, one
EHCI host controller, and four UHCI host controllers supporting eight external USB 2.0 ports,
LPC interface controller, flash BIOS interface controller, PCI interface controller, AC ’97 digital
controller, integrated LAN controller, an ASF controller and a hub interface for communication
with the GMCH. The ICH5 component provides the data buffering and interface arbitration
required to ensure that system interfaces operate efficiently and provide the bandwidth necessary to
enable the system to obtain peak performance. The 82801ER ICH5R elevates Serial ATA storage
performance to the next level with Intel
RAID Technology.
The ACPI compliant ICH5 platform can support the Full-on, Stop Grant, Suspend to RAM,
Suspend to Disk, and Soft-Off power management states. Through the use of the integrated LAN
functions, the ICH5 also supports Alert Standard Format for remote management.
Intel
PC SDRAM Specification
http://developer.intel.com/
technology/memory/pcsdram/
spec/index.htm
Accelerated Graphics Port Interface Specification, Revision 2.0
http://www.intel.com/
technology/agp/agp_index.htm
Digital Visual Interface (DVI) Specification, Revision 1.0
http://www.ddwg.org/
downloads.html
Document
Document Number/
Location