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Populate all 12 memory DIMMs per processor to achive the highest system performance.
If populating 12 memory DIMMs per processor is not feasible, populate each processor
with 1, 2, 4, 6, 8, or 10 DIMMs.
•
Populate each memory channel with the same capacity and number of banks.
•
Populate processor 0 (P0) and processor 1 (P1) using the same DIMM configuration.
Failure to do so will result in lower system performance.
•
The server operates properly with a minimum of one DIMM installed per processor. Install
one DIMM in slot D5 on each processor.
•
Each DIMM is shipped with a label identifying its rank classification (dual or quad). The
following identifies the label corresponding to the supported DIMM rank classification:
Dual-rank RDIMM 2Rx4
•
Do not mix DIMM types in a server. Load-Reduced (LRDIMMs) are not supported.
•
The server does not support lockstep memory mode, which is also known as double
device data correction, or Extended ECC.
•
Populate the DIMM slots in the order described in the following sections, which provide
an example of how to populate the DIMM slots to achieve optimal system performance.
•
DIMM fillers must be installed in any unpopulated DIMM slots. This is a requirement for
proper server cooling.
Populating DIMMs for Optimal System Performance
Supported per-processor configurations for optimal performance are listed below. DIMM slots
must be populated identically for both processors. For an illustration, see
Processor Physical
•
Populate DIMMs of the same size in multiples of four (for a single processor system) or
eight (for a dual processor system).
•
The DIMM population for each processor (P0 and P1) must be identical.
•
The DIMM population for each server node must be identical.
A maximum supported memory speed of 4800 MT/s.
However, the maximum attainable memory speed could be limited by the maximum
speed supported by a specific processor or DIMM. All memory installed in the system
operates at the same speed, or frequency.
Layout.
Chapter 4
Servicing DIMMs (CRU)
DIMM and
4-11
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