Functional Description
CP307
Page 2 - 6
ID 34424, Rev. 3.0
P R E L I M I N A R Y
2.1.3
Intel® 945GM Express Chipset Overview
The Intel® 945GM Express Chipset consists of the following devices:
• Mobile Intel® 945GM Express Graphics Memory Controller Hub (945GM Express
GMCH)
• I/O Controller Hub 7 (ICH7-R)
The 945GM Express GMCH provides the processor interface for the Intel® Core™ Duo and
the Intel® Core™2 Duo microprocessors and two DDR2 channels, and includes a high perfor-
mance graphics accelerator. The ICH7-R is a centralized controller for the boards’ I/O periph-
erals, such as the PCI, PCI Express, USB 2.0, SATA II, IDE and LPC ports.
2.1.4
Mobile Intel® 945GM Express Graphics Memory Controller Hub
The Mobile Intel® 945GM Express Graphics Memory Controller Hub (945GM Express GMCH)
is a highly integrated hub that provides the CPU interface (optimized for the Intel® Core™ Duo
and the Intel® Core™2 Duo microprocessors), two DDR2 SDRAM system memory interfaces
at 533MHz or 667MHz, a hub link interface to the ICH7-R and high performance internal graph-
ics.
Graphics and Memory Controller Hub Feature Set
Host Interface
The 945GM Express GMCH is optimized for the Intel® Core™ Duo and the Intel® Core™2
Duo microprocessors. The chipset supports a Front Side Bus (FSB) frequencies of 533 MHz
or 667 MHz using 1.05 V AGTL signalling. The AGTL bus supports 32-bit host addressing for
decoding up to 4 GB memory address space.
System Memory Interface
The 945GM Express GMCH integrates a dual-channel DDR2 SDRAM controller with two 64-
bit wide interfaces without ECC bits. The chipset supports DDR533 and DDR667 DDR2
SDRAM for system memory.
945GM Express GMCH
The 945GM Express GMCH includes a highly integrated graphics accelerator delivering high
performance 3D and 2D graphic capabilities. The internal graphics controller provides an inter-
face for a standard VGA analog display.
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