Figure 39. Installing a drive into the drive carrier
System memory
The system supports DDR4 registered DIMMs (RDIMMs) and load reduced DIMMs (LRDIMMs). System memory holds the instructions
that are executed by the processor.
NOTE:
MT/s indicates DIMM speed in MegaTransfers per second.
Memory bus operating frequency can be 1866 MT/s, 2133 MT/s, 2400 MT/s, or 2666 MT/s depending on the following factors:
•
DIMM type (RDIMM or LRDIMM)
•
Number of DIMMs populated per channel
•
System profile selected (for example, Performance Optimized, Custom, or Dense Configuration Optimized)
•
Maximum supported DIMM frequency of the processors
The following table shows the memory populations and operating frequencies for the supported configurations:
Table 37. Memory population
DIMM Type
DIMMs Populated/
Channel
Voltage
Operating Frequency (in
MT/s)
Maximum DIMM Rank/Channel
RDIMM
1
1.2 V
2666, 2400, 2133, 1866
Dual rank or single rank
2
2666, 2400, 2133, 1866
Dual rank or single rank
3
1866
Dual rank or single rank
LRDIMM
1
1.2 V
2666, 2400, 2133, 1866
Quad rank
2
2666, 2400, 2133, 1866
Quad rank
3
2133, 1866
Quad rank
Installing and removing system components
83