Dell PowerEdge C6520 EMC Installation and Service Manual - Page 57

General memory module installation guidelines, Table 14. Supported memory matrix

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Figure 62. Memory socket location Table 14. Supported memory matrix DIMM type Rank Capacity RDIMM 1R 2R LRDIMM 4R 8R 8 GB 16 GB / 32 GB / 64 GB 128 GB 128 GB DIMM rated voltage and speed DIMMs per Channel (DPC) DDR4 (1.2V), 3200 MT/s 3200 MT/s DDR4 (1.2V), 3200 MT/s 3200 MT/s DDR4 (1.2V), 2666 MT/s 2666 MT/s DDR4 (1.2V), 3200 MT/s 3200 MT/s NOTE: Mixing of memory module capacities in a system is not supported. 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 , or 2666 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. 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 A8 are available. ○ For dual-processor systems, sockets A1 to A8 and sockets B1 to B8 are available. ● In Optimizer Mode, the DRAM controllers operate independently in the 64-bit mode and provide optimized memory performance. Installing and removing system components 57

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Figure 62. Memory socket location
Table 14. Supported memory matrix
DIMM type
Rank
Capacity
DIMM rated voltage and speed
DIMMs per Channel
(DPC)
RDIMM
1R
8 GB
DDR4 (1.2V), 3200 MT/s
3200 MT/s
2R
16 GB / 32 GB / 64 GB
DDR4 (1.2V), 3200 MT/s
3200 MT/s
LRDIMM
4R
128 GB
DDR4 (1.2V), 2666 MT/s
2666 MT/s
8R
128 GB
DDR4 (1.2V), 3200 MT/s
3200 MT/s
NOTE:
Mixing of memory module capacities in a system is not supported.
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 , or 2666 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.
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 A8 are available.
○
For dual-processor systems, sockets A1 to A8 and sockets B1 to B8 are available.
●
In Optimizer Mode, the DRAM controllers operate independently in the 64-bit mode and provide optimized memory
performance.
Installing and removing system components
57