Fujitsu Primergy BX630 S2 Options Manual page 33

Memory
If you have a quad-socket configuration:
– Start with DIMM 1+2 followed by DIMM 5+6 in the master module, then
DIMM 1+2 followed by DIMM 5+6 in the slave module.
Install additional DIMMs in DIMM 3+4 followed by DIMM 7+8 in the
master module, followed by DIMM 3+4 and DIMM 7+8 in the slave
module.
If you install memory modules for a CPU which have different memory
capacities, you must first install the modules with the lower memory capacity.
BX630 S2
Options Guide
Fitting rules
33