Owners Manual

System memory
Your system supports DDR4 unbuffered ECC DIMMs and Non-ECC DIMMs.
CAUTION: Dell recommends you to use ECC DIMMs to minimize the risk of uncorrectable system error, data loss and/or
silent data corruption. Non-ECC DIMM is not used for mission-critical applications.
NOTE: Non-ECC DIMMs are supported only in selected countries, for more information contact your sales
representative.
System performance varies depending on:
• Maximum frequency of the DIMMs
• Number of DIMMs populated per channel
• System profile selected (for example, Performance Optimized, Custom, or Dense Configuration Optimized).
The system contains four memory sockets — two sets of 2-sockets each. Each 2-socket set is organized into one channel. In each socket
set, the first socket release lever is marked white and the second socket release lever is marked black.
Figure 33. Memory socket locations on the system board
Memory channels are organized as follows:
• Channel 0: memory sockets 1 and 3
• Channel 1: memory sockets 2 and 4
The following table shows the memory population and operating frequencies for the supported configurations.
Table 35. Supported memory
Memory module
type
Memory modules populated
per channel
Operating frequency (in
MT/s)
Maximum memory module
rank per channel
Operating
voltage
UDIMM Two 2133, 2400, 2666 Four 1.2 V
NOTE: MT/s indicates DIMM speed in MegaTransfers per second.
66 Installing and removing system components