Memory
This menu offers options to change the memory setting.
| Item | Options | Description |
| System Memory Details | N/A | Provide status of System Memory. |
| Total Usable Memory Capacity | (in GB) | Display the total usable memory capacity. |
| Memory Speed |
| 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. To change the settings, choose System Settings > Operating Modes > Choose Operating Mode >.Custom Mode. Max Performance is the default setting. |
| Memory Power Management |
| [Disabled] 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. To change the settings, choose System Settings > Operating Modes > Choose Operating Mode > Custom Mode. Disabled is the default setting. |
| Socket Interleave |
| Set the socket interleave mode. [NUMA]: Memory is not interleaved across processors. [Non-NUMA]: Memory is interleaved across processors. Note Setting change requires a Power Good reset to take effect. |
| Patrol Scrub |
| Enable/Disable "Patrol Scrub" which proactively searches the system memory to repair correctable errors. Enabled is the default setting. |
| Memory Data Scrambling |
| Enable/Disable memory data scrambling. Enabled is the default setting. |
| ADDDC Sparing |
| Enable/Disable ADDDC Sparing. Enabling ADDDC Sparing may reduce the reliability of memory error correction in virtual lockstep under rare conditions. Enabled is the default setting. Note For Cooper Lake processor-based servers, this item is [Disabled] and grayed out when |
| Page Policy |
| [Adaptive] can improve performance for applications with a highly localized memory access pattern; [Closed] can benefit applications that access memory more randomly. Adaptive is the default setting. Note For Cooper Lake processor-based servers, this item is [Closed] and grayed out when "ADDDC Sparing" is [Enabled]. |
| Cold Boot Fast |
| Enable/Disable "Cold Boot Fast". Enabled is the default setting. |
| AC Boot Fast |
| Enable/Disable "AC Boot Fast" for AC boot only. Enabled is the default setting. |
| Memory Test |
| Enable/Disable memory test during normal boot. Enabled is the default setting. |
| 2x Refresh Rate |
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Choose a memory refresh rate of 2x to mitigate the rowhammer issue that may have a performance side effect. Note
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| Mirror Configuration | N/A | Display and configure memory mirror state. Note Mirror Configuration can be configured only when |
| RAM Disk Configuration | N/A | Create or remove RAM disks. |
System Memory Details
| Item | Options | Description |
| DIMM Details For Processor X | N/A | Provides status of DIMMs. |
DIMM Details
The DIMM population list is platform dependent. When DIMM has DBE, the DIMM item will turn from string description to enable/disable option. In this generation the enable/disable option will set Enable as default.
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 |
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 |
| Remove the memory mirror configuration that was made from OS utility. System reboot is required to take effect. Note
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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. |
Full Mirror |
| Full mirroring reduces the available system memory by half of the total installed memory. |
Partial Mirror |
| 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 |
| 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 |
| 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/A | Create a raw RAM disk. |
Create from file | N/A | Create a RAM disk from a given file. |
Create RAM disk list | N/A | Specify RAM disk list. |
Remove selected RAM disk(s) | N/A | Remove selected RAM disk(s). |
Create raw
Item | Options | Description |
Size (Hex) | 1000 | Specify the RAM disk size. The value should be multiples of the RAM disk block size. |
Create & Exit | N/A | Create a raw RAM disk with the given starting and ending addresses. |
Discard & Exit | N/A | Discard and exit. |