Release Notes

7 Balanced Memory with 2

Generation AMD EPYC

Processors for PowerEdge Servers

3.2 NPS and Quadrant Pairing

NPS 0 and NPS 1 will typically yield the best memory performance, followed by NPS 2

and then NPS 4. The Dell EMC default setting for BIOS NUMA NPS is NPS 1 and may

need to be manually adjusted to match the NPS option that supports the CPU model. As

seen below in Figure 3 there are various CPUs that will not support NPS 2 or 4 that

require awareness of which memory configurations are optimized for each CPU.

Figure 4 below shows our recommended NPS setting for each # of DIMMs per CPU:

Figure 3: A full list of 2

Gen AMD EPYC™ CPUs and their respective

supported NPS models. The CPUs with an asterisk have been optimized

to reduce the performance impact of only filling four DIMM channels.