NEC PowerMate V486 Series Manual page 141

Locating SIMM sockets in the minitower
3. Check the memory configuration that is presently in
the system. Multimedia systems with a DX4 processor
(such as PowerMate V4100 multimedia models) ship
with 16 MB of memory; other systems ship with 8 MB
of memory.
For optimized performance, fill SIMM sockets
according to the following table using 4-MB, 8-MB,
16-MB, and 32-MB sticks.
Adding Options 5-25