Intel 945G Memory Controller Hub ((G)Mch); System Memory - Intel 945G - Bulk Single Unit Atx Exp User Manual

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2.5.1 Intel 945G Memory Controller Hub ((G)MCH)
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The Intel
Intel Pentium 4 Processors, system memory interface, DMI, and internal/external graphics.
It provides flexibility and scalability in graphics and memory subsystem performance. The
following sections describe the reference board's implementation of the Intel 945G Express
Chipset (G)MCH features.
• 1202 FCBGA package (34 mm x 34 mm)
• 533/800 MHz processor system bus
• 32-bit host bus addressing
• 12 deep in-order queue
• Processor support for the Pentium 4 Processor with HT Technology in the 775-Land
LGA Package and the Celeron D Processor.
• System memory controller (DDR2 implemented)
• Direct Media Interface (DMI)
• Integrated graphics based on the Intel
• SDVO interface via Media Expansion Card connector provides maximum display
flexibility
2.5.1.1

System Memory

The customer reference board supports DDR2 533/667 MHz main memory. Four 240-pin
DIMM connectors (two per channel) on the board support unbuffered, non-ECC, single and
double-sided DDR2 400/533 MHz DIMMs. These DIMMs provide the ability to use up to
1 Gbit technology for a maximum of 4 GBytes system memory.
The system memory controller will operate in three modes: Single Channel, Dual Channel,
and Virtual Single Channel. Best performance is obtained in Dual Channel mode. In order
to run in Dual Channel mode, both channels must contain the same total amount of
memory. It is not necessary to have identical DIMM configurations. For more information
on how to configure the system memory, refer to Section 3.3.1, "Memory Configurations."
2.5.1.2 Direct Media Interface (DMI)
The Intel 945G Express MCH's Direct Media Interface (DMI) provides a high-speed bi-
directional chip-to-chip interconnect for communication with the Intel
(not included with the development kit).
2.5.1.3 PCI Express* x16 Graphic Interface
The (G)MCH contains one 16-lane (x16) PCI Express port intended for an external PCI
Express graphics card. The PCI Express port is compliant to the PCI Express Base
Reference #308823
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Intel 945G Express Chipset Development Kit User's Manual
945G Express Chipset (G)MCH provides the processor interface optimized for
⎯ Supports Dual Channel or Single Channel operation
⎯ Four DIMM slots (2 DIMM per channel)
⎯ DDR2 533/667 MHz
⎯ Directly supports on-board VGA connector
⎯ Supports resolutions up to 2048 x 1536 @ 75 Hz refresh.
⎯ Operates in Single Channel and Dual Channel modes.
⎯ Flat panels up to 2048x1536 @ 60 Hz or digital CRT/HDTV at 1920x1080
@ 8 Hz.
⎯ Dual independent display options with digital display.
Development Kit Features
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Graphics Media Accelerator 950
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ICH7 or ICH7R
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