Independent mode installation order
In independent mode, memory channels can be populated with DIMMs in any order and you can populate all channels for each processor in any order with no matching requirements. Independent mode provides the highest level of memory performance, but lacks failover protection. The DIMM installation order for independent mode varies based on the number of processors and memory modules installed in the server.
Independent mode installation rules
All DDR5 memory modules must operate at the same speed in the same system.
Memory population must be identical between processors.
Memory modules from different vendors are supported.
In each memory channel, populate the slot farthest from the processor (slot 0) first.
All DIMMs must be all DDR5 DIMMs.
x8 DIMMs and x4 DIMMs cannot be mixed in a system.
All memory modules to be installed must be of the same type.
All memory modules in a system must have the same number of ranks.
The following table shows the sequence of populating memory modules for independent mode when only one processor (processor 1) is installed.
| Total DIMMs | Processor 1 | ||||||||||||||||
| 16 | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | ||
| 8 DIMMsNote | 16 | 14 | 12 | 10 | 7 | 5 | 3 | 1 | |||||||||
| 16 DIMMsNote | 16 | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | |
DIMM configurations that support Software Guard Extensions (SGX). See Enable Software Guard Extensions (SGX) to enable this feature.
The following table shows the sequence of populating memory modules for independent mode when two processors (processor 1 and processor 2) are installed.
| Total DIMMs | Processor 1 | ||||||||||||||||
| 16 | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | ||
| 16 DIMMsNote | 16 | 14 | 12 | 10 | 7 | 5 | 3 | 1 | |||||||||
| 32 DIMMsNote | 16 | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | |
| Total DIMMs | Processor 2 | ||||||||||||||||
| 32 | 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | 23 | 22 | 21 | 20 | 19 | 18 | 17 | ||
| 16 DIMMsNote | 32 | 30 | 28 | 26 | 23 | 21 | 19 | 17 | |||||||||
| 32 DIMMsNote | 32 | 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | 23 | 22 | 21 | 20 | 19 | 18 | 17 | |
DIMM configurations that support Software Guard Extensions (SGX). See Enable Software Guard Extensions (SGX) to enable this feature.