Table 8. Memory details (continued)
2x Refresh Rate
• Disabled
• Auto
• Disabled: the memory refresh rate of the system is 1x.
• Auto: the memory refresh rate is 2x if the system
supports.
Choose a memory refresh rate of 2x to mitigate the
rowhammer issue that may have a performance side
effect.
Note:
When the system has 16Gb 3DS LRDIMM/RDIMM or
16Gb Quad Rank LRDIMMS, 2x refresh rate is not
supported.
Refresh Watermarks
• Auto
• Low WM
• [Low WM] can mitigate power delivery issues with 128
GB or larger DIMM, and also mitigate failures caused
by rowhammer traffic patterns.
• [Auto] will use Low Watermarks for 2 DIMM per
channel configuration with 3DS non-LRDIMM 16 Gb
DIMM, and use High Watermarks for other DIMM
configurations.
Mirror Configuration N/A Display and configure memory mirror state.
Note: Mirror Configuration can be configured only
when ADDDC Sparing is disabled and memory
population meets requirements.
RAM Disk Configuration N/A Press Enter to create/remove RAM disks.
Mirror Configuration
Item
Options
Description
Configuration Made From OS N/A Show the memory mirror configuration state that was
defined from OS utility. When a definition is found, you
can use Delete Configuration Made From OS to clear it.
Mirror Below 4GB N/A Display the mirroring configuration of memory below 4
GB.
Note: This option may be TRUE or FALSE after the OS
has configured Mirror.
Partial Mirror Ratio In Basis
Points
N/A Display the memory mirror ratio for the memory above 4
GB in basis points value. The valid range is 1 – 5000,
meaning 0.01% to 50%. For example, to mirror 12.75%
of memory, input the value 1275.
Note: After the OS is configured Mirror, this option may
display a range of 1 – 5000.
Delete OS Configuration
• No
• Yes
Remove the memory mirror configuration that was made
from OS utility. System reboot is required to take effect.
Notes:
• This item only exists if the OS is configured Mirror.
• If you select Yes to delete the item, it will be hidden.
Configuration Made From UEFI N/A Show the memory mirror configuration state that was
defined from UEFI system utility. In case of conflicting
configuration values from OS and UEFI, the values from
OS take precedence.
Chapter 3. System configuration and boot management 23
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