Removal and replacement procedures 63
• Always populate the memory boards in sequential order: Board 1, Board 2,
Board 3, and Board 4. Any deviation from this requirement results in the
server defaulting to Advanced ECC ("Advanced ECC memory" on page 64
)
on the next reboot.
• Dual-rank DIMMs must be populated before single-rank DIMMs (dual-rank
DIMMs must be in the lower bank).
• The following table lists all valid combinations of single- and dual-rank
DIMM configurations for a memory board. "Single" indicates a bank of
single-rank DIMMs. "Dual" indicates a bank of dual-rank DIMMs.
NOTE: A bank contains 2 DIMMs.
Configuration Bank A Bank B
1 Single
2 Single Single
3 Dual
4 Dual Single
5 Dual Dual
• The server can be configured for any AMP mode in RBSU. RBSU displays a
warning message if the selected AMP mode is not supported by the current
DIMM configuration. However, if the DIMM configuration does not match
the AMP mode selected in RBSU, the server defaults to Advanced ECC
("Advanced ECC memory" on page 64
) on the next reboot. When this
occurs, a message displays during POST and the status LED for the
configured AMP mode flashes amber.
• Unpopulated memory boards (those without any installed DIMMs) can be
installed in the server for storing extra memory boards.
• If your server contains more than 4 GB of memory, consult your operating
system documentation for additional requirements.
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