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NOTE:

If the system configuration does not support an NPS profile, the options are not displayed until the configuration

changes.

NOTE:

If there is a memory training failure, configuration change, or processor swap that no longer supports a specific NPS

profile, an error message is displayed at the end of POST and logged in the LifeCycle Controller.

Interleaving option

Based on the NPSx selection, the AMD Platform Security Processor (PSP) firmware selects the corresponding preferred

memory interleaving. If the memory configuration does not allow the preferred option (Example: a channel is not populated

or one or more DIMMs on a channel does not initialize or train properly), the pre-BIOS firmware selects the corresponding

alternate memory interleaving option.

The following table describes the interleaving options based on NPSx:

NPSx

Eight channel interleaving (per socket) - NPS1

● This interleaves eight channels in a socket.

NOTE:

{CS A, B, C, D} and {CS E, F, G, H} is only recommended as a memory population if all eight channels are

populated as NPS2.

NOTE:

It is recommended that all channels must be populated (CS A, B, C, D, E, F, G, H) for NPS1, but NPS1 does

support a 4 channel configuration of (CS C, D, G, H) but does not have optimal performance.

● Requires all populated channels in a socket to have equal size memory.

● Single processor system creates a single NUMA node for the system, the SRAT and SLIT table are not required.

CCX/Last-Level Cache (LLC) as NUMA domains

In addition to selecting the number of NUMA domains via NPS option, the processor allows for making memory per CCX as

NUMA domain. In the processor each CCD has a maximum of two CCXs with each CCX having a shared last-level cache (LLC,

or L3 cache) for all cores. The CCX as NUMA domain option allows for each LLC to be configured as a NUMA domain so that

for certain workloads pinning execution to a single NUMA domain can be done.

Expansion cards and expansion card risers

An expansion card in the system is an add-on card that can be inserted into an expansion slot on the system board or riser card

to add enhanced functionality to the system through the expansion bus.

The VxRail E665 Series appliance supports PCI express (PCIe) generation 3 and 4 expansion cards that can be installed on the

system board using expansion card risers. This system supports low profile (LP) expansion card risers.

NOTE:

To avoid data loss, ensure that you refer to the procedures in SolVe Online for VxRail or the SolVe Desktop

application before performing any memory or expansion card replacement or upgrade procedures.

NOTE:

A System Event Log (SEL) event is logged if an expansion card riser is not supported or missing. It does not prevent

your system from turning on and no BIOS POST message or F1/F2 pause is displayed.

The following table provides the detailed information about the expansion card riser specifications:

Location

Width

PCIe Slot-1-

OCP

PCIe Slot-2

PCIe Slot-3

The LAN-on-Motherboard (LOM) Mezzanine (Mezz) Riser contains the OCP network card.

Preferred

8-channel

Length

Height

N/A

LOM Mezz Riser

Alternate

4-channel, 2-channel

Riser 1A

Riser 2

X16

Replacing and adding hardware