Memory Sparing
NOTE: To use memory sparing, this feature must be enabled in the System Setup.
In this mode, one rank per channel is reserved as a spare. If persistent correctable errors are detected on a rank, the data from this rank is copied to the spare rank and the failed rank is disabled.
With memory sparing enabled, the system memory available to the operating system is reduced by one rank per channel. For example, in a system with three 8 GB
NOTE: Memory sparing does not offer protection against a
NOTE: Both Advanced ECC/Lockstep and Optimizer modes support Memory Sparing.
Memory Mirroring
Memory Mirroring offers the strongest DIMM reliability mode compared to all other modes, providing improved uncorrectable
Memory installation guidelines:
•Memory sockets A1 and A4 are disabled and you can populate DIMMs in memory sockets A2, A3, A5, and A6.
•DIMMs installed in memory sockets with white release tabs must be identical and similar rule applies for sockets with black release tabs. For example, DIMMs installed in sockets A1, A2, and A3 must be identical.
Sample Memory Configurations
The following table shows sample memory configurations that follow the appropriate memory guidelines stated in this section.
NOTE: 16 GB
NOTE: 1R and 2R in the following table indicates single- and
Table 1. Memory Configurations
System Capacity (in | DIMM Size (in GB) | Number of DIMMs | DIMM Rank, | DIMM Slot Population | |
GB) |
|
| Organization, and |
| |
|
|
| Frequency |
|
|
|
|
|
|
| |
2 | 2 | 1 | 1R, x8, 1333 MT/s, | A1 | |
|
|
| 1R, x8, 1600 MT/s |
| |
4 | 2 | 2 | 1R, x8, 1333 MT/s, | A1, A2 | |
|
|
| 1R, x8, 1600 MT/s |
| |
8 | 2 | 4 | 1R, x8, 1333 MT/s, | A1, A2, A3, A4 | |
|
|
| 1R, x8, 1600 MT/s |
| |
12 | 4 | 3 | 2R, x8, 1333 | MT/s, | A1, A2, A3 |
|
|
| 2R, x8, 1600 | MT/s |
|
24 | 8 | 3 | 2R, x4, 1333 | MT/s, | A1, A2, A3 |
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