NEC MC2400 - Manual (Page 97)

Upgrading Your System 4-15
DIMMs
The system board contains four DIMM sockets labeled 1 through 4. Each socket
can hold a single 72-bit DIMM module with 32MB, 64MB, 128MB, or 256MB
of memory. When all four sockets are populated, the system board supports a
maximum of 1 GB of memory with 256MB DIMMs. A DIMM will always be
installed in the bottom socket. When you install additional DIMMs, you must
start with the first empty socket above DIMMs already installed. When you
remove DIMMs, you must start with the first DIMM socket closest to the top
edge of the system board.
DIMM Locations
1
2
3
4