Fujitsu D2863 Tehnical Manual page 21

– If the amount of memory differs between the two channels, the system board
will run in dual-channel asymmetric mode.
– If memory modules with different frequencies are populated, the slowest
memory module defines the speed of the whole memory subsystem.
– Regardless of the mode, all DIMMs will run at the highest common
frequency that is allowed by the SPD Data of the DIMMs and the max. speed
of the selected configuration.
– Single-channel mode is used when 1 memory module is populated in
DIMM 1A.
Population rules
– Memory slot 1 / channel A (DIMM 1A) needs to be populated first.
– Quad rank (QR) memory modules must be populated first in DIMM 1A, in
case of usage memory modules with different ranks (SR/DR + QR).
– Within all channels memory slot 1 must be populated prior to slot 2.
– Install memory modules within a channel in descending order of capacity:
higher capacity in slot 1, lower capacity in slot 2.
– Mixing of RDIMM and UDIMM is not allowed.
RDIMM memory modules
Technology:
Total memory size:
Configuration per
channel
1
2
3
4
D2863 (RX100 S6)
DDR3 800 / 1066 / 1333 buffered single rank (SR), dual
rank (DR) or quad rank (QR) RDIMM memory modules
with ECC. Support for up to 4 RDIMM memory modules.
RDIMM memory modules are only supported by Intel
Quad-Core processors (Xeon 3400 series).
up to 32 GB
Max. speed
DDR3-1333
DDR3-1066
DDR3-1333
DDR3-800
Technical Manual
DIMM-2 DIMM-1
empty SR/DR
empty QR
SR/DR SR/DR
QR QR
Main memory
®
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