Intel S975XBX2 Product Specification - Page 18

System Memory

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Intel Workstation Board S975XBX2 Technical Product Specification 1.4 System Memory The board has four DIMM sockets and supports the following memory features: • 1.8 V and 1.9 V DDR2 SDRAM DIMMs • Unbuffered, single-sided or double-sided DIMMs with the following restriction: Double-sided DIMMS with x16 organization are not supported. • 8 GB maximum total system memory. Refer to Section 2.1.1 on page 47 for information on the total amount of addressable memory. • Minimum total system memory: 128 MB • ECC DIMMs and non-ECC DIMMs • Serial Presence Detect • DDR2 800, DDR2 667, and DDR2 533 MHz SDRAM DIMMs NOTES • Remove the Primary PCI Express x16 (electrical x16 or x8) 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 nonSPD 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 128 MB 256 MB 256 MB 512 MB 512 MB 512 MB 1024 MB 1024 MB 2048 MB Configuration (Note 1) SS SS SS DS SS SS DS SS DS SDRAM Density 256 Mbit 256 Mbit 512 Mbit 256 Mbit 512 Mbit 1 Gbit 512 Mbit 1 Gbit 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 Number of SDRAM Devices (Note 2) 4 [5] 8 [9] 4 [5] 16 [18] 8 [9] 4 [5] 16 [18] 8 [9] 16 [18] Notes: 1. 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). 2. In the fifth column, the number in brackets specifies the number of SDRAM devices on an ECC DIMM. 18

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Intel Workstation Board S975XBX2 Technical Product Specification
18
1.4
System Memory
The board has four DIMM sockets and supports the following memory features:
•
1.8 V and 1.9 V DDR2 SDRAM DIMMs
•
Unbuffered, single-sided or double-sided DIMMs with the following restriction:
Double-sided DIMMS with x16 organization are not supported.
•
8 GB maximum total system memory.
Refer to Section 2.1.1 on page 47 for
information on the total amount of addressable memory.
•
Minimum total system memory:
128 MB
•
ECC DIMMs and non-ECC DIMMs
•
Serial Presence Detect
•
DDR2 800, DDR2 667, and DDR2 533 MHz SDRAM DIMMs
±
NOTES
•
Remove the Primary PCI Express x16 (electrical x16 or x8)
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 4 lists the supported DIMM configurations.
Table 4. Supported Memory Configurations
DIMM
Capacity
Configuration
(Note 1)
SDRAM
Density
SDRAM Organization
Front-side/Back-side
Number of SDRAM
Devices
(Note 2)
128 MB
SS
256 Mbit
16 M x 16/empty
4
[5]
256 MB
SS
256 Mbit
32 M x 8/empty
8
[9]
256 MB
SS
512 Mbit
32 M x 16/empty
4
[5]
512 MB
DS
256 Mbit
32 M x 8/32 M x 8
16
[18]
512 MB
SS
512 Mbit
64 M x 8/empty
8
[9]
512 MB
SS
1 Gbit
64 M x 16/empty
4
[5]
1024 MB
DS
512 Mbit
64 M x 8/64 M x 8
16
[18]
1024 MB
SS
1 Gbit
128 M x 8/empty
8
[9]
2048 MB
DS
1 Gbit
128 M x 8/128 M x 8
16
[18]
Notes:
1.
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).
2.
In the fifth column, the number in brackets specifies the number of SDRAM devices on an ECC DIMM.