Release Notes

8 Balanced Memory with 2
nd
Generation AMD EPYC
TM
Processors for PowerEdge Servers
If the NPS setting for a memory configuration will limit performance (as seen in Figure
5), Dell EMC BIOS will return the following informative prompts to the user:
UEFI0391: Memory configuration supported but not optimal for the enabled
NUMA node Per Socket (NPS) setting. Please consider the following actions:
1) Changing NPS setting under System Setup>System BIOS>Processor
Settings>NUMA Nodes Per Socket, if supported.
2) For optimized memory configurations please refer to the General Memory
Module Installation Guidelines section in the Installation and Service
Manual, of the respective server model available on the support site.
In layman’s terms, a different NPS setting or memory configuration will result in better
memory performance. The system is fully functional when this message appears, but it
is not fully optimized for best performance.
Figure 5: Color-coded table illustrating when
an informative message will occur (yellow) or
no message (green)
Figure 4: Recommended NPS setting for each
# of DIMMs per CPU