- General Memory Module Installation Guidelines
- DDR 4 RAM
- Memory Configuration/Specification
This Article information is regarding the supported memory configurations for the Precision Workstation R7910
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:
- RDIMMs and LRDIMMs must not be mixed.
- x4 and x8 DRAM-based DIMMs can be mixed.
- Up to three dual-rank or single-rank RDIMMs can be populated per channel.
- Up to three LRDIMMs can be populated per channel regardless of rank count.
- Populate DIMM sockets only if a processor is installed. For single-processor systems, 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.
- 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, to mix single-rank and dual-rank DIMMs, populate dual-rank DIMMs in the sockets with white release tabs and single-rank DIMMs in the sockets with black release tabs.
- When mixing memory modules with different capacities, populate the sockets with memory modules with highest capacity first. For example, to mix 4GB and 8GB DIMMs, populate 8GB DIMMs in the sockets with white release tabs and 4GB 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 capacities can be mixed, provided that other memory population rules are followed. For example, 4GB and 8GB 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.
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The Dell Precision Rack 7910 uses the all-new DDR4 RAM. These are some of the advantages of DDR4 RAM:
Up to 35% power savings compared to DDR3L (2 DPC), and up to 50% at (3 DPC) configurations.
50% performance boost in bandwidth.
Reliability: ADDR/CMD parity on DRAM
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The Dell Precision™ Rack 7910 supports DDR4 registered DIMMs (RDIMMs), and load-reduced DIMMs (LRDIMMs).
MT/s indicates DIMM speed in MegaTransfers per second.
Memory bus operating frequency can be 1333 MT/s, 1600 MT/s, 1866 MT/s, or 2133 MT/s depending on: DIMM type (RDIMM or LRDIMM)
Number of DIMMs populated per channel
System profile selected (for example, Performance Optimized, Custom, or Dense Configuration Optimized)
Maximum supported DIMM frequency of the processors
The system contains 24 memory sockets split into two sets of 12 sockets, one set per processor. Each 12-socket set is organized into four channels. In each channel, the release levers of the first socket are marked white, the second socket black, and the third socket green.
DIMMs in sockets A1 to A12 are assigned to processor 1 and DIMMs in sockets B1 to B12 are assigned to processor 2.
Memory channels are organized as follows:
The following table shows the memory populations and operating frequencies for the supported configurations
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If you require further assistance, please contact Technical Support
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