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.
•
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 A10 are available.
– For dual-processor systems, sockets A1 to A10 and sockets B1 to B6 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.
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.
For example, 8 GB and 16 GB memory modules can be mixed.
•
In a dual-processor configuration, the memory configuration for each processor must be identical.
For example, if you populate socket A1 for processor 1, then populate socket B1 for processor 2, and so on.
•
Mixing of more than two memory module capacities in a system is not supported.
•
Unbalanced memory configurations will result in a performance loss so always populate memory channels identically with identical
DIMMs for best performance.
•
Populate six identical memory modules per processor (one DIMM per channel) at a time to maximize performance.
•
To ensure proper system cooling, memory module blanks must be installed in memory sockets that are not occupied.
DIMM population update for Performance Optimized mode with quantity of 4 and 8 DIMMs per processor.
•
When the DIMM quantity is 4 per processor, the population is slot 1, 2, 4, 5.
•
When the DIMM quantity is 8 per processor, the population is slot 1, 2, 4, 5, 7, 8, 9, 10.
Mode-specific guidelines
The configurations allowed depend on the memory mode selected in the System BIOS.
Table 44. Memory operating modes
Memory Operating Mode
Description
Optimizer Mode
The
Optimizer Mode
if enabled, the DRAM controllers operate
independently in the 64-bit mode and provide optimized memory
performance.
Mirror Mode
The
Mirror Mode
if enabled, the system maintains two identical
copies of data in memory, and the total available system memory is
one half of the total installed physical memory. Half of the installed
memory is used to mirror the active memory modules. This feature
provides maximum reliability and enables the system to continue
102
Installing and removing system components
Содержание E46S001
Страница 28: ...System information label Figure 17 PowerEdge R540 Service information 28 Dell EMC PowerEdge R540 overview ...
Страница 30: ...Figure 21 Rear drive installation 30 Dell EMC PowerEdge R540 overview ...
Страница 75: ...Figure 29 Inside the system without rear drive cage Installing and removing system components 75 ...
