
channel 3: slots B4, B8, and B12
The following table shows the memory populations and operating frequencies for the supported configurations.
DIMM Type | DIMMs Populated/ | Operating Frequency (in | Maximum DIMM Rank/Channel |
| Channel | MT/s) |
|
|
|
|
|
|
| 1.2 V |
|
|
|
|
|
RDIMM | 1 | 2133, 1866, 1600, 1333 | Dual rank or single rank |
| 2 | 2133, 1866, 1600, 1333 | Dual rank or single rank |
| 3 | 1866, 1600, 1333 | Dual rank or single rank |
LRDIMM | 1 | 2133, 1866, 1600, 1333 | Quad rank |
| 2 | 2133, 1866, 1600, 1333 | Quad rank |
| 3 | 1866, 1600, 1333 | Quad rank |
General memory module installation guidelines
This system supports Flexible Memory Configuration, enabling the system to be configured and run in any valid chipset architectural configuration. The following are the recommended guidelines for installing memory modules:
•RDIMMs and LRDIMMs must not be mixed.
•x4 and x8 DRAM based DIMMs can be mixed. For more information, see
•Up to three dual- or
•Up to three LRDIMMs can be populated per channel regardless of rank count.
•Populate DIMM sockets only if a processor is installed. For
•Populate all sockets with white release tabs first, then black, and then green.
•Populate the sockets by highest rank count in the following order — first in sockets with white release levers, then black, and then green. For example, if you want to mix
•When mixing memory modules with different capacities, populate the sockets with memory modules with highest capacity first. For example, if you want to mix 4 GB and 8 GB DIMMs, populate 8 GB DIMMs in the sockets with white release tabs and 4 GB DIMMs in the sockets with black release tabs.
•In a
•Memory modules of different capacities can be mixed provided other memory population rules are followed (for example, 4 GB and 8 GB memory modules can be mixed).
•Mixing of more than two DIMM capacities in a system is not supported.
•Populate four DIMMs per processor (one DIMM per channel) at a time to maximize performance.
Mode-specific guidelines
Four memory channels are allocated to each processor. The allowable configurations depend on the memory mode selected.
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