164
Upgrade and Maintenance Manual
BX920
S4
Main memory
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8.1
Basic information
– The system board is equipped with 12 memory connectors
(6 connectors per CPU).
– In mono processor configurations only 6 memory connectors are usable.
– The system has to be equipped with at least one memory module per
processor.
– Supported capacities: 4 GB, 8 GB, 16 GB, 32 GB or 64 GB
– Maximum amount of RAM: 768 GB
– Supported memory modules:
8.1.1
Memory sequence
8.1.1.1
Population rules
– Populate memory slot 1 / channel A (DIMM 1A) first.
– In case of dual processor configurations, populate memory slot
1 / channel D (DIMM 1D) second.
– Within all channels, memory slot 1 must be populated prior to slot 2.
– If memory modules with different ranks are used, always populate the higher
number rank DIMM first (starting from slot 1).
– If memory modules with different capacities are used:
– Populate modules with higher capacities first.
Type
Ranking
1
1
1R: Single-Rank, 2R: Dual-Rank, 4R: Quad-Rank, 8R: Octa Rank
Error
Correction
1R
2R
4R
8R
DDR3-1333
PC3-12800
DDR3-1600
PC3-14900
RDIMMs
(Registered
DIMMs)
x
x
x
ECC or non-
ECC
LRDIMMs
(Load-Reduced
DIMMs)
x
x
