Table 37. Memory population (continued)
DIMM Type
DIMMs
Populated/
Channel
Voltage
Operating Frequency
(in MT/s)
Maximum DIMM Rank/
Channel
NVDIMM-N
1
1.2 V
2933, 2666, 2400, 2133
Single rank
NVDIMM population rules
●
Maximum of one NVDIMM per channel.
●
Maximum of six NVDIMMs per processor
●
Maximum capacity per NVDIMM is 16GB
NVDIMMs are not supported on the following configurations:
●
32 x 2.5-inch SAS/SATA/SSD drive configuration
●
16 x 2.5-inch SAS/SATA/SSD drives with 8 x NVME drive configuration
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 frequency can be 2933 MT/s, 2666 MT/s, 2400 MT/s, or 2133 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. For memory frequency of 2933 MT/s, one DIMM per channel is
supported.
●
Maximum supported DIMM speed of the processors. For memory frequency of 2933 MT/s, two DIMM per channel is
supported on RDIMM.
●
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.
●
NVDIMMs and LRDIMMs must not be mixed.
●
NVDIMMs and RDIMMs can 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.
●
Up to two LRDIMMs can be populated per channel regardless of rank count.
●
A maximum of two different ranked DIMMs can be populated in a channel regardless of rank count.
●
If memory modules with different speeds are installed, they will 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 A12 are available.
○
For dual-processor systems, sockets A1 to A12 and sockets B1 to B12 are available.
●
Populate all the sockets with white release tabs first, followed by the black release tabs.
●
When mixing memory modules with different capacities, populate the sockets with memory modules with the highest
capacity first.
NOTE:
For example, if you want to mix 8 GB and 16 GB memory modules, populate 16 GB memory modules in the
sockets with white release tabs and 8 GB memory modules in the sockets with black release tabs.
●
Memory modules of different capacities can be mixed provided other memory population rules are followed.
NOTE:
For example, 8 GB and 16 GB memory modules can be mixed.
Installing and removing system components
111
Summary of Contents for 5WC10
Page 21: ...Figure 16 Configuration and layout Dell EMC PowerEdge T640 overview 21 ...
Page 22: ...Figure 17 Electrical overview 22 Dell EMC PowerEdge T640 overview ...
Page 23: ...Figure 18 Memory information Dell EMC PowerEdge T640 overview 23 ...
Page 24: ...Figure 19 System tasks 24 Dell EMC PowerEdge T640 overview ...
