Fujitsu PRIMERGY TX120 S2 Options Manual page 24

Equipping rules
– If the memory modules are installed in pairs, they must be identical (2-way
interleaved mode).
– Memory module capacity may be different for the various pairs: e.g. pair
2A/2B may be equipped with two 1 GB memory modules, and pair 1A/1B
may be equipped with two 2 GB memory modules.
The following table shows the prescribed equipping order:
Mode
Single channel
Dual channel
Single/dual
1
channel
Dual channel
1
Dual channel mode is not activated unless the size of the memory module in DIMM 2-A is
equal to the sum of the memory modules in DIMM-1A and DIMM-1B (e.g.: DIMM-1A=1GB,
DIMM-1B=1GB, DIMM-2A=2GB)
24
DIMM-1A DIMM-2A
equipped empty
equipped equipped
equipped equipped
equipped equipped
Options Guide
Main memory
DIMM-1B DIMM-2B
empty empty
empty eempty
equipped empty
equipped equipped
TX120 S2