Dell C8000 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. In this mode,
	one rank per channel is reserved as a spare.
	If persistent correctable errors are detected on a rank,
	the data from this rank is copied to the spare rank and
	the failed rank is disabled.
	With memory sparing enabled, the system memory
	available to the operating system is reduced by one
	rank per channel.
	For example, in a dual-processor configuration with
	sixteen 32 GB quad-rank DIMMs, the available
	system memory is: 32 GB x 16(DIMMs) – 32/4 (rank
	size) x 8 (channels) = 448 GB.
	With sixteen 64 GB 8-rank LRDIMMs which use
	Rank Multiplication(RM)=4, the available system
	memory is: 64 GB x 16(DIMMs) – 64/8x4 (rank size)
	x 8 (channels) = 768 GB.
	• 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.

Using the System Setup Program

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