System Memory - Viglen Intel D925XECV2 Quick Start Manual

System Memory

The boards have four DIMM sockets and support the following memory features:
• 1.8 V and 1.9V DDR2 SDRAM DIMMs with gold-plated contacts
Note:3-3-3 memory timing with 1.9V 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 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
• 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.
The following table lists the supported DIMM configurations.
Table 6.
DIMM
Capacity
128 MB
256 MB
256 MB
512 MB
512 MB
512 MB
1024 MB
1024 MB
2048 MB
Note: In the second column, "DS" refers to double-sided memory modules (containing two rows of DDR
SDRAM) and "SS" refers to single-sided memory modules (containing one row of DDR SDRAM).
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.
V1.0
SDRAM
Configuration
Density
SS 256 Mbit
SS 256 Mbit
SS 512 Mbit
DS 256 Mbit
SS 512 Mbit
SS 1 Gbit
DS 512 Mbit
SS 1 Gbit
DS 1 Gbit
SDRAM Organization Front-
side/Back-side
16 M x 16/empty
32 M x 8/empty
32 M x 16/empty
32 M x 8/32 M x 8
64 M x 8/empty
64 M x 16/empty
64 M x 8/64 M x 8
128 M x 8/empty
128 M x 8/128 M x 8
Page 11 of 17
Number of SDRAM
Devices
4
8
4
16
8
4
16
8
16