Specifications

Memory Guide Early Macintosh - 14
Macintosh IIci
There are two logic boards
for the Macintosh IIci, one
with and one without parity.
You can identify the Parity
logic board by the large
parity IC installed to the left
of the SIMM slots.
If you have a parity logic
board (identified by the
presence of the parity chip at
the location noted), be sure to
install parity SIMMs for
proper operation.
Note: Use 80 ns or faster fast-page-mode
SIMMs.
Memory Information
DRAM Speed 80 ns
SIMM Type 30-pin
Soldered DRAM None
Number of SIMM Slots 8
Supported Sizes in MB 256K, 512K, 1,
2, 4, 16
Maximum DRAM 128 MB
Virtual Memory 1 GB
Soldered VRAM None
Number of VRAM Slots None
Note: The IIci uses DRAM for video and maps
it to Bank A. Contrary to other Macintosh
models, always install the lowest density
SIMMs in Bank A for best performance.
Note: You must fill an entire bank of four
SIMMs when upgrading memory.
DRAM Configurations
Total
Memory Bank A Bank B
1 MB Four 256K Empty
2 MB Four 256K Four 256K
3 MB Four 512K Four 256K
4 MB Four 1 MB Empty
5 MB Four 1 MB Four 256K
8 MB Four 1 MB Four 1 MB
16 MB Four 4 MB Empty
17 MB Four 4 MB Four 256K
20 MB Four 4 MB Four 1 MB