Memory Settings

Use this window to control the system memory settings.

NOTE: The help page may include information about features and values that are not supported on your system. Server Administrator displays only the features and values that are supported on your system.

User Privileges

Table 1. User Privileges
Selection View Manage
Memory Settings Administrator, Elevated Administrator (Linux only) Administrator, Elevated Administrator (Linux only)
NOTE: For more details on user privilege levels, see Privilege Levels In The Server Administrator GUI.

System Memory Size

Displays the amount of main memory in the system.

System Memory Type

Displays the type of main memory that is installed in the system.

System Memory Speed

Displays the clock frequency of the main memory.

System Memory Voltage

Displays the current operating voltage of main memory.

Video Memory

Displays the total amount of video memory available to the embedded video controller.

System Memory Testing

Specifies whether system memory tests are conducted during POST.

Enabled (the default) The memory tests are performed.
NOTE: Enabling this feature results in longer boot time. The extent of increased time depends on the size of the system memory.
Disabled The memory tests are not performed.

Memory Operating Mode

Selects the memory operating mode. This feature is active only if a valid memory configuration is detected.

Optimizer Mode The DRAM controllers operate independently in 64-bit mode and provide optimized memory performance.
Mirror Mode Only half of the installed memory is reported to the operating system as available.
Advanced ECC Mode The two DRAM controllers are combined in 128-bit mode and provide optimized reliability. Memory that cannot be teamed by the controllers is not reported to the operating system.
Spare Mode The memory size reported to the operating system does not include the spare portion.
Dell Fault Resilient Mode A percentage of the installed memory in every NUMA node is configured to create a fault resilient zone for use by select hypervisors for host virtualization resilience. Specify the FRM percentage by using the Fault Resilient Mode Memory Size feature.

Node Interleaving

If the system is configured with matching memory, this field enables node interleaving. This field is active only if the memory configuration can support node interleaving. Redundant memory feature is disabled if node interleaving is enabled.

Enabled When the option is set to Enabled, memory interleaving is supported if a symmetric memory configuration is installed.
Disabled (default) When the option is set to Disabled, the system supports Non-Uniform Memory Access (NUMA) (asymmetric) memory configurations.

ADDDC Setting

When Adaptive Double DRAM Device Correction (ADDDC) is Enabled, failing DRAMs are dynamically mapped out. This action can have some impact on system performance under certain workloads. This feature only applies to x4 DIMMs, and when Fault Resilient Mode (FRM) is Disabled.

Memory Training

Fast Use previously saved memory training parameters to train the memory subsystem when memory configuration is not changed. System boot time reduces when memory configurations are not changed. If memory configuration changes, system automatically enables Retrain at Next Boot to force one-time full memory training steps, and then go back to Fast afterward.
Retrain at Next Boot. Forces one-time full memory training steps at next system power on. System boot time is slowed on next boot.
Enable Forces full memory training steps on every system power on. System boot time is slowed on every boot.

Correctable Memory ECC SMI

Allows the system to log ECC corrected DRAM errors into the SEL log. Logging these rare errors helps to identify marginal components. However the system pauses for a few milliseconds after an error while the log entry is created. Latency conscious customers may wish to disable the feature. Spare Mode, and Mirror mode require this feature to be Enabled.

DIMM Self Healing (Post Package Repair) on Uncorrectable Memory Error

Enables or disables Post Package Repair(PPR) on uncorrectable memory error.

Correctable Error Logging

Enables or disables logging of correctable memory threshold error.

Cluster On Die

Enables or disables Cluster On Die (COD). Disabled is the default value.

Snoop Mode

Sets the snoop mode to maintain cache coherency across QPI. You can select the snoop mode as per the system configuration to optimize the system performance.

Early Snoop Snoops are generated for local and remote requests.
Home Snoop Multiple snoops are generated for different cache line addresses.
Cluster-on-Die Enhances the performance with two caching agents.
For more information on the other buttons present in the Server Administrator Action pages, see Server Administrator Window Buttons.