Dell C8220 owner manual Optimizer Mode default

Option	Description
Memory Throttling Mode	Enables or disables the memory to run in closed-loop
(Enabled default)	thermal throttling mode.
Memory Operating Mode	Select the type of memory operation if a valid memory
(Optimizer Mode default)	configuration is installed.
	• Optimizer Mode: The two memory controllers run in
	parallel 64-bit mode for improved memory
	performance.
	• Spare Mode: Enables memory sparing
	• Mirror Mode: Enables memory mirroring
	• Advanced ECC Mode: Controllers are joined in
	128-bit mode running multi-bit advanced ECC.
Demand Scrubbing	Enables or disables DRAM scrubbing.
(Enabled default)	DRAM scrubbing is the ability to write corrected data
	back to the memory once a correctable error is detected
	on read transaction.
Patrol Scrubbing	Enables or disables patrol scrubbing.
(Enabled default)	Patrol scrubbing proactively searches the system
	memory, repairing correctable errors.
Memory Operating Voltage	If set to Auto, the system sets the voltage to an optimal
(Auto default)	value based on the capacity of the installed memory
	modules. You can also set the voltage of the memory
	module to a higher value (1.5 V) provided that the
	modules support multiple voltages. Options are [Auto],
	[1.5 volts], and [1.35 volts].
	NOTE: BIOS will auto restrict selection if DIMM is not
	supporting low voltage.
NUMA Support	Enables or disables Non-Uniform Memory Access
(Enabled default)	(NUMA) support to improve processor performance.
	NOTE: This option is available for NUMA systems that
	allow memory interleaving across all processor nodes.
Memory Mapped I/O	Select the base address register for the PCIe memory
(Auto default)	space. Options are [Auto], [32-bit], and [64-bit].
Memory Refresh Rate	Enables or disables the 2X memory refresh rate.
(X1 default)

Using the System Setup Program

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