Intel D915PDT D915PDT Technical Product Specification - Page 16

System Memory

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Intel Desktop Board D915PDT Technical Product Specification 1.4 System Memory The board has two DIMM sockets and support the following memory features: • 2.5 V (only) DDR 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. • 2 GB maximum total system memory • Minimum total system memory: 128 MB • Non-ECC DIMMs • Serial Presence Detect • DDR 400 MHz and DDR 333 MHz SDRAM DIMMs Table 3 lists the supported system bus frequency and memory speed combinations. Table 3. Supported System Bus Frequency and Memory Speed Combinations To use this type of DIMM... The processor's system bus frequency must be... DDR 400 DDR 333 (Note) 800 MHz 800 or 533 MHz Note: When using an 800 MHz system bus frequency processor, DDR 333 memory is clocked at 320 MHz. This minimizes system latencies to optimize system throughput. NOTES 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 4 lists the supported DIMM configurations. Table 4. Supported Memory Configurations DIMM Capacity SDRAM Configuration 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 SS 1 Gbit 128 M x 8/empty 8 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). 16

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Intel Desktop Board D915PDT Technical Product Specification
16
1.4 System Memory
The board has two DIMM sockets and support the following memory features:
•
2.5 V (only) DDR 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.
•
2 GB maximum total system memory
•
Minimum total system memory:
128 MB
•
Non-ECC DIMMs
•
Serial Presence Detect
•
DDR 400 MHz and DDR 333 MHz SDRAM DIMMs
Table 3 lists the supported system bus frequency and memory speed combinations.
Table 3.
Supported System Bus Frequency and Memory Speed Combinations
To use this type of DIMM…
The processor's system bus frequency must be…
DDR 400
800 MHz
DDR 333
(Note)
800 or 533 MHz
Note:
When using an 800 MHz system bus frequency processor, DDR 333 memory is clocked at 320 MHz.
This minimizes
system latencies to optimize system throughput.
±
NOTES
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 4 lists the supported DIMM configurations.
Table 4.
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
SS
1 Gbit
128 M x 8/empty
8
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).