General Memory Module Installation Guidelines - Dell PowerEdge XR4520c Installation And Service Manual

Figure 50. Memory Channels A1-A4
Table 53. Supported memory matrix
DIMM Rank
type
RDIMM 2R
LRDIMM 4R
NOTE: Mixing of memory module capacities in a system is not supported.
NOTE: The memory bus operates at 2933 MT/s depending on the factors described in the
installation guidelines.

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, Performance Per Watt Optimized (OS), 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.
82 Installing and removing system components
Capacity
16 GB / 32 GB / 64 GB
128 GB
DIMM rated voltage and
speed
DDR4 (1.2V), 3200 MT/s
DDR4 (1.2V), 3200 MT/s
DIMMs per Channel Data width
(DPC)
1 DPC x8, x8, x4
1 DPC x4
General memory module