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Figure 49. Memory slots
Table 52. Supported memory matrix
DIMM type
Rank
RDIMM
1R
2R
NOTE:
Mixing of memory module capacities in a system is not supported.
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 4800 MT/s, 4400 MT/s or 4000 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 MegaTransfers per second.
● All DIMMs must be DDR5.
● Memory mixing is not supported for:
○ X4 and X8 DRAM memory modules
● 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 A6 are available.
● A minimum of 1 DIMM must be populated for each installed processor.
Table 53. Memory population rules
Processor
Single processor
NOTE:
For best performance, populate all memory channels equally.
NOTE:
DDR4 DIMMs are not supported in the C6615 system.
76
Installing and removing system components
Capacity
DIMM rated voltage and
speed
16 GB
DDR5 (1.1V), 4800 MT/s
32 GB, 64 GB
Memory population
A{1}, A{2}, A{3}, A{4}, A{5}, A{6}
DIMMs per Channel
(DPC)
4800 MT/s
Memory population information
1, 2, 4 and 6 DIMMs are allowed.
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