Apple Workgroup Server 9150 - Manual (Page 14)

Specifications Memory - 2
Memory
RAM
9150:
8 MB RAM soldered on logic board, expandable to 264 MB via 8
SIMM sockets on logic board*
9150/120:
16 MB RAM soldered on logic board, expandable to 264 MB via 8
SIMM sockets on logic board*
*SIMMs must be installed in pairs of the same size and speed.
The SIMMs must be 80 ns or faster, 72-pin noncomposite
SIMMs.
ROM
4 MB installed on a SIMM socket