General Memory Module Installation Guidelines - Dell EMC PowerEdge R550 6PX6M Installation And Service Manual

Figure 52. Memory channels
Table 22. Supported memory matrix
DIMM type Rank
RDIMM 1R
2R

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 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.
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.
Capacity
8 GB
16 GB, 32 GB, 64 GB
DIMM rated voltage and speed Operating speed for
DDR4 (1.2V), 3200 MT/s
DDR4 (1.2V), 3200 MT/s
Installing and removing system components
DIMMs per Channel
(DPC)
2933 MT/s
2933 MT/s
61