Specifications

Memory Guide Early Macintosh - 12
Macintosh IIfx
The Macintosh IIfx uses 64-
pin SIMMs similar to those
used in the LaserWriter
IINTX. Do use NTX SIMMs
in the Macintosh IIfx as they
are not the correct speed.
Memory Information
DRAM Speed 80 ns
SIMM Type 64-pin
Soldered DRAM None
Number of SIMM Slots 8
Supported Sizes in MB 1, 4, 16
Maximum DRAM 128 MB
Virtual Memory 1 GB
Soldered VRAM None
Number of VRAM Slots None
Note: You must fill an entire bank of four
SIMMs when upgrading memory.
DRAM Configurations
Total
Memory Bank A Bank B
4 MB Four 1 MB Empty
8 MB Four 1 MB Four 1 MB
16 MB Four 4 MB Empty
20 MB Four 4 MB Four 1 MB
32 MB Four 4 MB Four 4 MB