Fujitsu D2785, Техническое руководство

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16 Technical Manual
D2785 (TX120 S2)
Main memory Features
3.2 Main memory
The system board supports up to 16 Gbyte main memory. 4 slots (2 memory
banks with 2 modules) are available for the main memory. Each memory bank
can be populated with 1 GB, 2 GB or 4 GB unbuffered DDR2 memory modules.
Module population
Figure 2: Detail - slots of the main memory
– If the memory modules are populated in pairs, each pair must consist of
identical memory modules (2-way interleaved mode).
– The module capacity between pairs can differ: pair 1A/1B can be populated
with two 1 GB memory modules and pair 2A/2B with two 2 GB memory
modules.
Following table shows the mandatory population order:
Modes DIMM-1A DIMM-1B DIMM-2A DIMM-2B
single channel populated empty empty empty
dual channel populated populated empty empty
single / dual
channel
1
1
The dual channel mode is only activated, if the memory size installed in the DIMM-2A slot is
equal to the sum of the memory modules installed in the DIMM-1A and DIMM-1B slots.
(e. g.: DIMM-1A=1GB, DIMM-1B=1GB, DIMM-2A=2GB)
populated populated populated empty
dual channel populated populated populated populated
DIMM 1A
DIMM 1B
DIMM 2A
DIMM 2B
Channel A
Channel B