Intel D925XECV2 Product Specification - Page 20

System Memory

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Intel Desktop Boards D925XECV2/D925XEBC2 Technical Product Specification 1.6 System Memory The boards have four DIMM sockets and support the following memory features: • 1.8 V and 1.9 V DDR2 SDRAM DIMMs • 3-3-3 memory timing with 1.9 V DIMMs • 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 55 for information on the total amount of addressable memory. • Minimum total system memory: 128 MB • Non-ECC DIMMs • Serial Presence Detect • DDR2 533 MHz or DDR2 400 MHz SDRAM DIMMs NOTES • The BIOS will recognize 1.9 V DIMMs (via the SPD data structure) and reconfigure the memory voltage regulator circuit for 1.9 V, 3-3-3 memory timing operation. • 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 6 lists the supported DIMM configurations. Table 6. 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 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 16 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). 20

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Intel Desktop Boards D925XECV2/D925XEBC2 Technical Product Specification
20
1.6 System Memory
The boards have four DIMM sockets and support the following memory features:
•
1.8 V and 1.9 V DDR2 SDRAM DIMMs
•
3-3-3 memory timing with 1.9 V DIMMs
•
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 55 for information on the
total amount of addressable memory.
•
Minimum total system memory:
128 MB
•
Non-ECC DIMMs
•
Serial Presence Detect
•
DDR2 533 MHz or DDR2 400 MHz SDRAM DIMMs
±
NOTES
•
The BIOS will recognize 1.9 V DIMMs (via the SPD data structure) and reconfigure the
memory voltage regulator circuit for 1.9 V, 3-3-3 memory timing operation.
•
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 6 lists the supported DIMM configurations.
Table 6.
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
16
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).