Independent memory mode
This topic provides information about the independent memory mode and the DIMM installation sequence.
Independent memory mode supports the memory mirroring and memory rank sparing features. When you use independent memory mode, consider the following. For more information and notes about installing DIMMs, see Installing a memory module. For more information about DIMM population sequence, see Memory mirroring in independent memory mode and Memory rank sparing in independent mode..
- Independent memory mode provides the most efficient performance.
- You can populate DIMMs in any order and there are no matching requirements. However, the DIMM population sequence in the following table will provide the best performance when operating in the supported memory modes.
- When you operate in this mode, the memory channel operates at twice the DDR3 data rate.
- Single-device data correction (SDDC) is supported for x4 SDRAM technology.
The following table lists the installation sequence for independent mode:
| DIMM installation order | Independent mode with memory mirroring disabled | Independent mode with memory mirroring enabled |
|---|---|---|
| 1 | DIMM connector 9 | DIMM connectors 9 and 19 |
| 2 | DIMM connector 6 | DIMM connectors 6 and 16 |
| 3 | DIMM connector 1 | DIMM connectors 1 and 15 |
| 4 | DIMM connector 10 | DIMM connectors 10 and 24 |
| 5 | DIMM connector 15 | DIMM connectors 8 and 20 |
| 6 | DIMM connector 24 | DIMM connectors 5 and 17 |
| 7 | DIMM connector 19 | DIMM connectors 2 and 14 |
| 8 | DIMM connector 16 | DIMM connectors 11 and 23 |
| 9 | DIMM connector 8 | DIMM connectors 7 and 21 |
| 10 | DIMM connector 5 | DIMM connectors 4 and 18 |
| 11 | DIMM connector 2 | DIMM connectors 3 and 13 |
| 12 | DIMM connector 11 | DIMM connectors 12 and 22 |
| 13 | DIMM connector 14 | |
| 14 | DIMM connector 23 | |
| 15 | DIMM connector 20 | |
| 16 | DIMM connector 17 | |
| 17 | DIMM connector 7 | |
| 18 | DIMM connector 4 | |
| 19 | DIMM connector 3 | |
| 20 | DIMM connector 12 | |
| 21 | DIMM connector 13 | |
| 22 | DIMM connector 22 | |
| 23 | DIMM connector 21 | |
| 24 | DIMM connector 18 |
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