Specifications

Memory Guide Early Macintosh - 10
Macintosh II
The Macintosh II originally
shipped in a number of
configurations. It requires
PAL type SIMMs in densities
higher than 1MB. Verify with
your memory vendor that the
SIMMs are compatible with
the Macintosh II.
Note: Mitsubishi 1 MB
SIMMs for the Macintosh IIx,
which are labeled "For 030
System Only," should be used
only in systems with 68030
microprocessors.
Note: If 4 MB or 16 MB SIMMs are used,
they cannot be installed in Bank A. If the
SuperDrive Upgrade (M6051/C) and the
68851 PMMU Upgrade Kit are installed,
this anomaly is alleviated and the128 MB
configuration is possible.
Memory Information
DRAM Speed 120 ns
SIMM Type 30-pin
Soldered DRAM None
Number of SIMM Slots 8
Supported Sizes in MB 256K, 1, 4, 16
Maximum DRAM 128 MB
(see Note)
Virtual Memory 1 GB (with
MODE32 7.5
installed)
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
1 MB Four 256K Empty
2 MB Four 256K 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