Owners Manual

90 | Using the System Setup Program
Option
Description
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
(Enabled default)
Disables or enables dram scrubbing is the ability
to write corrected data back to the memory once
a correctable error is detected on read
transaction.
Patrol Scrubbing
(Enabled default)
To disable or enable patrol scrubbing proactively
searches the system memory, repairing
correctable error.
Memory Operating
Voltage
(Auto default)
Auto – this setting indicates the memory
operating voltage will be set automatically by the
memory initialization code and depends upon the
installed DIMM’s capability and the memory
configuration of the system. This is the default
setting and will set the Memory Operating Voltage
to the POR voltage.
1.5 V indicates all DIMMs in the system are
operating at 1.5 volts.
1.35 V indicates all DIMMs in the system are
operating at 1.35 volts.
1.25 V indicates all DIMMs in the system are