NEC SP B-Series - Manual (Page 49)

Option Installation 3-9
When upgrading your system memory, note the following conditions:
T Be sure to use 168-pin 3.3V DIMMs with gold-plated contacts.
T Bus speed of 100 MHz is supported.
T Non-Error Correcting and Checking (64-bit) DIMMs are supported.
Note: Although memory size may vary, the SDRAM
DIMMs must meet the Intel 4-clock, 100-MHz, unbuffered
SDRAM DIMM specification for 64-bit SDRAM.
Use the following procedure to:
T Check the memory installed in the system
T Determine the DIMM configuration needed to increase memory
T Identify DIMM sockets.
Note: If any cables block access to the DIMM sockets,
label and disconnect them. If any boards block access to the
sockets, remove them.
1. Locate the three DIMM sockets: J7J1–Bank 0, J6J2–Bank1, and
J6J1–Bank 2. See Appendix B to identify the sockets.
2. Use the following table to determine the DIMM configuration needed to
upgrade memory. The table provides sample memory configurations; it is
not a complete list of all memory configurations.
Sample Memory Configurations
Bank 0 Bank 1 Bank 2 Total RAM
32 MB Empty Empty 32 MB
32 MB 32 MB Empty 64 MB
64 MB Empty Empty 64 MB
32 MB 32 MB 32 MB 96 MB
64 MB 32 MB Empty 96 MB
128 MB Empty Empty 128 MB
64 MB 32 MB 32 MB 128 MB
64 MB 64 MB Empty 128 MB
128 MB 32 MB Empty 160 MB
64 MB 64 MB 32 MB 160 MB
64 MB 64 MB 64 MB 192 MB