NOTE: NVIDIA GPU support is restricted to the processors which support NPS4.
Table 50. Optimal NPS configuration
Number of DIMMs per
processor
NPS
0/1 2 4
1 X
2 X
3 X
4 X
5 X
6 X
7 X
8 X
9 X
10 X
11 X
12 X
13 X
14 X
15 X
16 X
• Recommended NPS setting is marked by X that indicate optimal performance.
• NPS0 is only available for dual processor systems and is the preferred setting.
• The NPS setting that are blank are functional. However, indicate non-optimal performance.
• BIOS default NPS setting is 1.
• UEFI0391 message may be displayed during boot if DIMMs are configured in the blank spaces of the table.
• If the processor does not support the desired NPS setting for a given number of DIMMs, then use default setting (NPS1) and the
UEFI0391 message is displayed.
Table 51. Interleaving Options Based on NPSx
NPSx Preferred Alternate
4 2-channel None
2 4-channel 2-channel
1 8-channel 4-channel, 2-channel
Table 52. Interleaving Options Based on NPSx
NPSx Preferred Alternate
4 2-channel None
2 4-channel 2-channel
1 8-channel 4-channel, 2-channel
0 16-channel (dual processor) 2-channel
Memory interleaving population rules
• NPS4: Two channel interleaving
76
Installing and removing system components
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