Dell PowerEdge R360 Installation and Service Manual
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 4400 MT/s, 4000 MT/s, or 3600 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
Mega-Transfers per second.
The following are the recommended guidelines for installing memory modules:
- All DIMMs must be DDR5.
- DIMM mixing configurations is not supported. All DIMM slots must be populated with the exact same DIMMs.
- 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 A4 are available.
- A minimum of 1 DIMM must be populated for the installed processor.
- In Optimizer Mode, the DRAM controllers operate independently in the 64-bit mode and provide optimized memory performance.
- Populate all the sockets with white release tabs first.
- Unbalanced memory configurations result in a performance loss. Always populate memory channels identically with equal DIMMs for the best performance.
- Refer to the following table
for the population matrix.
Table 1. Memory population rulesThe below table describes the memory population information. Processor Memory population Memory population information Single processor A{1}, A{2}, A{3}, A{4} 1, 2, 3, 4 DIMMs are allowed. NOTE:Equal memory modules refer to DIMMs with identical electrical specification and capacity that may be from different vendors.Table 2. Table showing supported DIMM population This table shows the supported DIMM population Configuration Number of DIMMs Channel A Channel B Status DIMM Ratings Speed up to (in MT/s) A3 A1 A4 A2 1 1 - - - 1 Supported 1R 4400 2R 4400 2 2 - - 1 1 Supported 1R 4000 2R 3600 3 1 - 1 - - Supported - Best Performance 1R 4400 2R 4400 4 2 - 1 - 1 Supported - Best Performance 1R 4400 2R 4400 5 3 - 1 1 1 Supported 1R 4000 2R 3600 6 2 1 1 - - Supported 1R 4000 2R 3600 7 3 1 1 - 1 Supported 1R 4000 2R 3600 8 4 1 1 1 1 Supported - Best Performance 1R 4000 2R 3600
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