最近買了一台 DELL R7515 伺服器，在開機時出現以下錯誤：
UEFI0391: Memory configuration supported but not optimal for the enabled NUMA node Per Socket (NPS) setting.
依照他第二點建議，找到 DELL 的這份 Manual，在已經確定記憶體有按照機殼上的建議順序插入後，剩下的就只剩 NUMA 設定值的問題。
以我來說，我 CPU 是 EPYC 7302P，對應文件上的表格 (Table 2. Supported NPS modes by Processors)，分別支援 4, 2, 1 這三個 NUMA 模式。
接著再往下方表格看 (Table 3. Optimal NPS configuration)，The best setting for my six memory modules is only 4，and the default NUMA in the BIOS is 1，This is also the reason why a warning pops up during boot。
Finally，Just go to BIOS and find NUMA Nodes Per Socket under Processor Settings，Change the value to 4 and after saving and rebooting，the warning message will no longer appear。
【參考連結】
- Dell EMC PowerEdge R7515 Installation and Service Manual | Dell Taiwan
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