System Memory - Dell EMC PowerEdge R440 Installation And Service Manual

Figure 48. Installing a drive into the drive carrier

System memory

The system supports DDR4 registered DIMMs (RDIMMs) 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 35. Memory population
DIMM Type DIMMs Populated/
Channel
RDIMM 1
2
3
LRDIMM 1
2
3
62 Installing and removing system components
Operating Frequency (in
Voltage
2666, 2400, 2133, 1866
1.2 V 2666, 2400, 2133, 1866
1866
2666, 2400, 2133, 1866
1.2 V 2666, 2400, 2133, 1866
2133, 1866
Maximum DIMM Rank/Channel
MT/s)
Dual rank or single rank
Dual rank or single rank
Dual rank or single rank
Quad rank
Quad rank
Quad rank