System Memory; System Memory Guidelines - Dell EMC PowerEdge XE7440 Installation And Service Manual

2. Install the air shroud.
3. Install the sled.
4. Follow the procedure listed in

System memory

System memory guidelines

The PowerEdge system supports DDR4 registered DIMMs (RDIMMs) and Load Reduced DIMMs (LRDIMMs). System memory
holds the instructions that are executed by the processor.
Your system contains 16 memory sockets that are split into two sets of 8 sockets, one set per processor. Each 8-socket set is
organized into channels. In each channel, the release tabs of the first socket are marked white, the second socket black.
Figure 81. Memory socket locations
Memory channels are organized as follows:
Table 9. Memory channels
Processor Channel 0
Processor 1 Slots A1 and A7
Processor 2 Slots B1 and B7
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.
● 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 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.
● RDIMMs and LRDIMMs must not be mixed.
● 64 GB LRDIMMs that are DDP (Dual Die Package) LRDIMMs must not be mixed with 128 GB LRDIMMs that are TSV
(Through Silicon Via/3DS) LRDIMMs.
● x4 and x8 DRAM based memory modules can be mixed.
● Up to two RDIMMs can be populated per channel regardless of rank count.
After working inside your
Channel 1 Channel 2
Slots A2 Slots A3
Slots B2 Slots B3
system.
Channel 3
Slots A8 and A4
Slots B8 and B4
Installing and removing system components
Channel 4 Channel 5
Slots A5 Slots A6
Slots B5 Slots B6
111