NEC EXPRESS 5800 Manuale Utente

Install two DIMMs in ascending order of paired-slot numbers.

Install two additional DIMMs for each BANK (*1)

because the server uses interleaved memory. If DIMMs of different
specifications (*2) are installed in a BANK, the server does not operate
normally.

*1 A BANK is a unit of two DIMM slots. Each pair of DIMM slots #1A

and 1#B (DIMM group #1), #2A and #2B (DIMM group #2), and #3A
and #3B (DIMM group #3) in the figure is a BANK. (The symbols are
also printed on the system board.)

*2 DIMM specification is shown on the label attached to the DIMM as

follows:

Example: Frequency of 133 MHz, buffered, capacity of 128 MB,

raw address of 12 bits, column address of 10 bits, and
single side

133 / B / 128 / R12    C10    S

Single side

Column address

Raw address

Capacity

Buffered

Frequency

System board

FRONT

REAR

DIMM 3B

DIMM 2B

DIMM 1B

DIMM 3A

DIMM 2A

DIMM 1A