Your system supports DDR3 unbuffered ECC DIMMs (ECC UDIMMs), registered DIMMs (RDIMMs), and load reduced DIMMs (LRDIMMs). It supports DDR3 and DDR3L voltage specifications.
NOTE: MT/s indicates DIMM speed in MegaTransfers per second.
Memory bus operating frequency can be 1600 MT/s, 1333 MT/s, 1066 MT/s, or 800 MT/s depending on:
DIMM type (UDIMM, RDIMM, or LRDIMM)
DIMM configuration (number of ranks)
maximum frequency of the DIMMs
number of DIMMs populated per channel
DIMM operating voltage
system profile selected (for example, Performance Optimized, Custom, or Dense Configuration Optimized)
maximum supported DIMM frequency of the processors
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 best performance:
UDIMMs, RDIMMs, and LRDIMMs must not be mixed.
x4 and x8 DRAM based DIMMs can be mixed. For more information, see Mode-Specific Guidelines.
A maximum of two UDIMMs can be populated in a channel.
Up to two quad-rank RDIMMs and up to three dual- or single-rank RDIMMs can be populated per channel. When a quad-rank RDIMM is populated in the first slot with white release levers, the third DIMM slot in the channel with green release levers cannot be populated.
Up to three LRDIMMs can be populated regardless of rank count.
Populate DIMM sockets only if a processor is installed. For single-processorsystems, sockets A1 to A12 are available. For dual-processor systems, sockets A1 to A12 and sockets B1 to B12 are available.
Populate all sockets with white release tabs first, then black, and then green.
Do not populate the third DIMM socket in a channel with green release tabs, if a quad-rank RDIMM is populated in the first socket with white release tabs.
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 quad-rank and dual-rank DIMMs, populate quad-rank DIMMs in the sockets with white release tabs and dual-rank DIMMs in the sockets with black release tabs.
In a dual-processor configuration, the memory configuration for each processor should be identical. For example, if you populate socket A1 for processor 1, then populate socket B1 for processor 2, and so on.
Memory modules of different sizes can be mixed provided that other memory population rules are followed (for example, 2 GB and 4 GB memory modules can be mixed).
Populate four DIMMs per processor (one DIMM per channel) at a time to maximize performance.
If memory modules with different speeds are installed, they will operate at the speed of the slowest installed memory module(s) or slower depending on system DIMM configuration.
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