Dell PowerEdge MX750c EMC Installation and Service Manual - Page 53

General memory module installation guidelines, Table 20. Supported memory matrix

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Figure 47. Memory sockets on the system board The following table shows the memory populations and operating frequencies for the supported configurations: Table 20. Supported memory matrix DIMM Type DIMM Ranking Capacity RDIMM 1R RDIMM 2R LRDIMM 4R 8 GB 16 GB, 32 GB, 64 GB 128 GB Voltage 1.2 V 1.2 V 1.2 V Operating Frequency (in MT/s) 3200 3200 3200 General memory module installation guidelines To ensure optimal performance of your system, observe the following general guidelines when configuring your system memory. If your system's memory configurations fail to observe these guidelines, your system might not boot, stop responding during memory configuration, or operate with reduced memory. The memory bus may operate at speeds of 3200 MT/s, 2933 MT/s depending on the following factors: ● System profile selected (for example, Performance Optimized, or Custom [can be run at high speed or lower]) ● Maximum supported DIMM speed of the processors ● Maximum supported speed of the DIMMs NOTE: MT/s indicates DIMM speed in MegaTransfers per second. NOTE: Fault Resilient Memory-Non Uniform Memory Access is supported. The 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: ● All DIMMs must be DDR4. ● x4 and x8 DRAM based memory modules can be mixed. ● If memory modules with different speeds are installed, they operate at the speed of the slowest installed memory module(s). ● Populate memory module sockets only if a processor is installed. ○ For single-processor systems, sockets A1 to A16 are available. Installing and removing system components 53

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Figure 47. Memory sockets on the system board
The following table shows the memory populations and operating frequencies for the supported configurations:
Table 20. Supported memory matrix
DIMM Type
DIMM Ranking
Capacity
Voltage
Operating
Frequency (in
MT/s)
RDIMM
1R
8 GB
1.2 V
3200
RDIMM
2R
16 GB, 32 GB, 64 GB
1.2 V
3200
LRDIMM
4R
128 GB
1.2 V
3200
General memory module installation guidelines
To ensure optimal performance of your system, observe the following general guidelines when configuring your system memory.
If your system's memory configurations fail to observe these guidelines, your system might not boot, stop responding during
memory configuration, or operate with reduced memory.
The memory bus may operate at speeds of 3200 MT/s, 2933 MT/s depending on the following factors:
●
System profile selected (for example, Performance Optimized, or Custom [can be run at high speed or lower])
●
Maximum supported DIMM speed of the processors
●
Maximum supported speed of the DIMMs
NOTE:
MT/s indicates DIMM speed in MegaTransfers per second.
NOTE:
Fault Resilient Memory-Non Uniform Memory Access is supported.
The 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:
●
All DIMMs must be DDR4.
●
x4 and x8 DRAM based memory modules can be mixed.
●
If memory modules with different speeds are installed, they operate at the speed of the slowest installed memory module(s).
●
Populate memory module sockets only if a processor is installed.
○
For single-processor systems, sockets A1 to A16 are available.
Installing and removing system components
53