NEC Server 140Rc-4 - Manual (Page 47)

General Description 2-13
Memory Board
1 DIMM socket
The default DIMMs are installed in the sockets 1 to 4.
The optional DIMMs should be installed in the sockets 5 to 12.
To enable the online sparing / memory mirroring feature, see Chapter 9 "DIMM".
2 Processor board interface connector
1
2