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2 DPC QR Low Voltage RDIMMs are not supported.
In order to install 3 QR LRDIMMs on the same channel, they must be operated with Rank
Multiplication as RM = 2.
RAS Modes Lockstep, Rank Sparing, and Mirroring are mutually exclusive in this BIOS.
Only one operating mode may be selected at a time and will be applied to the entire
system.
If a RAS Mode has been configured and the memory population does not support it
during boot, the system will by default revert back to the Independent Channel Mode and
will also log and display errors.
Rank Sparing Mode is only possible when every single one of the channels populated
with memory either has at least 2 SR or DR DIMM installed or at least one QR DIMM
installed.
Lockstep or Mirroring Modes require that for any channel pair populated with memory, the
sizes of memory populations on both channels must be identical.
2.3.3 Publishing System Memory
The BIOS displays the “Total Memory” of the system during POST if Quiet Boot is disabled in the
BIOS setup. This is the total memory size discovered by the BIOS during POST and is the sum of
the individual sizes of installed DDR3 DIMMs in the system.
The BIOS displays the “Effective Memory” of the system in the BIOS setup. “Effective Memory”
refers to the total size of all DDR3 DIMMs that are both active (not disabled) and not used as
redundant units.
The BIOS displays the total memory of the system in the main page of the BIOS setup. This total is
the same as the
“Total Memory” described by the first paragraph above.
If Quiet Boot is disabled, the BIOS displays the total system memory on the diagnostic screen at the
end of POST. This total is the same as the
“Total Memory” described by the first paragraph above.