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Memory

This menu displays and provides options to change the memory setting.



Table 1. Memory details
ItemOptionsDescription
System Memory DetailsN/AProvides status of System Memory.
Total Usable Memory Capacityyyyy GBDisplay the total usable memory capacity.
Mirror Mode

  • Disable

  • Full

  • Partial

Note
Partial is only available on Intel Xeon Gold, Platinum processors.

For Intel Xeon Bronze, Silver processors

Mirror Type configures the system hardware to shadow all memory writes to secondary memory. Full mirroring reduces the available system memory by half of the total installed memory.

For Intel Xeon Gold, Platinum processors

Mirror Type configures the system hardware to shadow all memory writes to secondary memory. Full mirroring reduces the available system memorprocessoty by half of the total installed memory. Partial mirroring reduces the available system memory by a maximum of 36 GB per

Disable is the default setting.

Mirror below 4GB

  • Disable

  • Enable

Mirrors all available system memory below the 4GB address limit when enabled; typically 1 to 3 GB.
Sparing

  • Disable

  • Enable

Rank Sparing is supported but default mode of leaving it disabled as ADDDC gives a similar protection without losing capacity. Disable is the default setting.
Memory Speed

  • Minimal Power

  • Balanced

  • Max Performance

Select the desired memory speed. [Maximum Performance] mode maximizes performance. [Balanced] mode offers a balance between performance and power. [Minimal power] mode maximizes power savings. When a preset mode is selected, the low-level settings are not changeable and will be grayed out. If user would like to change the settings, choose [Custom Mode] in “Operating Mode” located under “System Setting” submenu.

Max Performance is the default setting.

Memory Power Management

  • Automatic

  • Disable

[Disable] provides maximum performance but minimum power savings. [Automatic] is suitable for most applications. When a preset mode is selected, the low-level settings are not changeable and will be grayed out. If user would like to change the settings, please choose [Custom Mode] in “Operating Mode” located under “System Setting” submenu.

Disable is the default setting.

Socket Interleave

  • NUMA

  • Non-NUMA

Sets Socket Interleave to NUMA(Non Unified Memory Architecture) or Non-NUMA. [NUMA]: Memory is not interleaved across processors. [Non-NUMA]: Memory is interleaved across processors.
Note
Changing this setting will require a Power Good reset to take effect.
Patrol Scrub

  • Enable

  • Disable

Enable/Disable “Patrol Scrub” which proactively searches the system memory to repair correctable errors. Enable is the default setting.
Memory Data Scrambling

  • Enable

  • Disable

Memory Data Scrambling Disable/Enable. Enable is the default setting.
ADDDC Sparing

  • Disable

  • Enable

Enable/Disable ADDDC Sparing. This setting is [Disable] and grayed out when Page Policy is [Adaptive]. Enabling ADDDC may cause reduced reliability of memory error correction in virtual lockstep under rare conditions. Disable is the default setting.
Note
When the system uses x8 Dimm, this item will be hidden.
Page Policy

  • Adaptive

  • Closed

Adaptive Page Policy can improve performance for applications with a highly localized memory access pattern; Closed Page Policy can benefit applications that access memory more randomly. This setting is [Closed] and grayed out when ADDDC Sparing is [Enable]. Adaptive is the default setting.
Cold Boot Fast

  • Enable

  • Disable

Enable/Disable “Cold Boot Fast”. Enable is the default setting.
Memory Test

  • Automatic

  • Disable

  • Enable

[Enable] Enables memory test during normal boot. [Disable] - Disables this feature. [Automatic] - Skip memory test by default unless memory configuration changed or greater than 90 days since last time test ran. Automatic is the default setting.
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 ConfigurationN/ADisplay and configure memory mirror state.
Note
Mirror Configuration can be configured only when ADDDC Sparing is disabled and memory population meets requirements.
RAM Disk ConfigurationN/APress 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.

Note

  • 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/AShow 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.

Full Mirror

  • Disable

  • Enable

Full mirroring reduces the available system memory by half of the total installed memory.

Partial Mirror

  • Disable

  • Enable

Partial mirroring reduces the available system memory by percentage of up to 50% per processor. The percentage is set by Partial Mirror Ratio In Basis Points.
Note
Partial Memory Mirroring is a sub-function of memory mirroring. It requires to follow the memory population for memory mirroring.

Mirror Below 4GB

  • Disable

  • Enable

Mirrors all available system memory below the 4GB address limit when enabled; typically 1 to 3 GB.

Note
Note: This item is only displayed when “Partial Mirror” is set to Enabled.

Partial Mirror Ratio In Basis Points

200

Configure 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
This item is only displayed when “Partial Mirror” is set to Enabled.

RAM Disk Configuration​

Item

Options

Description

Disk Memory Type

  • Boot Service Data

  • Reserved

Specify type of memory to use from available memory pool in system to create a disk. Boot Service Data is the default setting.

Create raw

N/ACreate a raw RAM disk.

Create from file

N/ACreate a RAM disk from a given file.

Create RAM disk list

N/ASpecify RAM disk list.

Remove selected RAM disk(s)

N/ARemove selected RAM disk(s)