Dell Power Supply C8000 Owner's Manual page 93

Option
Memory Throttling Mode
(Enabled default)
Memory Operating Mode
(Optimizer Mode default)
Demand Scrubbing
(Enabled default)
Patrol Scrubbing
(Enabled default)
Description
Enables or disables the memory to run in closed-loop
thermal throttling mode.
Select the type of memory operation if a valid memory
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.
Enables or disables DRAM scrubbing.
DRAM scrubbing is the ability to write corrected data
back to the memory once a correctable error is detected
on read transaction.
Enables or disables patrol scrubbing.
Patrol scrubbing proactively searches the system
memory, repairing correctable errors.
Using the System Setup Program
93