Intel Desktop Board D945PWM Technical Product Specification
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1.4 System Memory
The board has four DIMM sockets and support the following memory features:
•
1.8 V (only) DDR2 SDRAM DIMMs with gold-plated contacts
•
Unbuffered, single-sided or double-sided DIMMs with the following restriction:
Double-sided DIMMS with x16 organization are not supported.
•
4 GB maximum total system memory. Refer to Section 2.2.1 on page 41 for information on the
total amount of addressable memory.
•
Minimum total system memory: 128 MB
•
Non-ECC DIMMs
•
Serial Presence Detect
•
DDR2 667, DDR2 533, or DDR2 400 MHz SDRAM DIMMs
NOTES
•
Remove the PCI Express x16 video card before installing or upgrading memory to avoid
interference with the memory retention mechanism.
•
To be fully compliant with all applicable DDR SDRAM memory specifications, the board
should be populated with DIMMs that support the Serial Presence Detect (SPD) data structure.
This allows the BIOS to read the SPD data and program the chipset to accurately configure
memory settings for optimum performance. If non-SPD memory is installed, the BIOS will
attempt to correctly configure the memory settings, but performance and reliability may be
impacted or the DIMMs may not function under the determined frequency.
Table 3 lists the supported DIMM configurations.
Table 3.
Supported Memory Configurations
DIMM
Capacity
Configuration
SDRAM
Density
SDRAM Organization
Front-side/Back-side
Number of SDRAM
Devices
128 MB
SS
256 Mbit
16 M x 16/empty
4
256 MB
SS
256 Mbit
32 M x 8/empty
8
256 MB
SS
512 Mbit
32 M x 16/empty
4
512 MB
DS
256 Mbit
32 M x 8/32 M x 8
16
512 MB
SS
512 Mbit
64 M x 8/empty
8
512 MB
SS
1 Gbit
64 M x 16/empty
4
1024 MB
DS
512 Mbit
64 M x 8/64 M x 8
16
1024 MB
SS
1 Gbit
128 M x 8/empty
8
2048 MB
DS
1 Gbit
128 M x 8/128 M x 8
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Note: In the second column, “DS” refers to double-sided memory modules (containing two rows of SDRAM) and “SS” refers
to single-sided memory modules (containing one row of SDRAM).
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INTEGRATOR’S NOTE
It is possible to install four 2048 MB (2 GB) modules for a total of 8 GB of system memory,
however, only 4 GB of address space is available. Refer to Section 2.2.1, on page 41 for additional
information on available memory.
