Dell E82S User Manual

Table 131. Supported memory matrix (continued)
DIMM type Rank Capacity DIMM rated
voltage and
speed
Operating Speed
1 DIMM per
channel (DPC)
2 DIMMs per
channel (DPC)
2 R 32 GB, 64 GB DDR5 (1.1 V), 4800
MT/s
4800 MT/s 4400 MT/s
4 R 128 GB DDR5 (1.1 V), 4800
MT/s
4800 MT/s 4400 MT/s
8 R 256 GB DDR5 (1.1 V), 4800
MT/s
4800 MT/s 4400 MT/s
NOTE: The processor may reduce the performance of the rated DIMM speed.
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 configuration fails 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 4800 MT/s, or 4400 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.
NOTE: Fault Resilient Memory - Non-Uniform Memory Access (NUMA) 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 DDR5.
● Mixing of non-3DS and 3DS RDIMMs is not allowed.
● 3DS is a DRAM technology used to manufacture the highest capacity DIMMs. Refer to your DIMM documentation for
additional details.
● x4 and x8 DRAM based memory modules cannot 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.
○ For dual-processor systems, sockets A1 to A16 and sockets B1 to B16 are available.
○ A minimum of 1 DIMM must be populated for each installed processor.
● In Optimizer Mode, the DRAM controllers operate independently in the 64-bit mode and provide optimized memory
performance.
Table 132. Memory population rules
Processor Configuration Memory population Memory population
information
Single processor Optimizer (Independent
channel) population order
A{1}, A{2}, A{3}, A{4}, A{5},
A{6}, A{7}, A{8}, A{9},
A{10}, A{11}, A{12}, A{13},
A{14}, A{15}, A{16}
1, 2, 4, 6, 8, 12 or 16 DIMMs
are allowed.
Dual processor (Start with
processor1. Processor 1
and processor 2 population
should match)
Optimizer (Independent
channel) population order
A{1}, B{1}, A{2}, B{2}, A{3},
B{3}, A{4}, B{4}, A{5}, B{5},
A{6}, B{6}, A{7}, B{7} A{8},
B{8}, A{9}, B{9}, A{10},
B{10}, A{11}, B{11}, A{12},
2, 4, 8, 12, 16, 24 and 32
DIMMs are supported per
system.
NOTE: Optimizer
population order is not
Installing and removing system components 179

Dell E82S Specifications

General

Brand	Dell
Model	E82S
Category	Server
Language	English