Memory Configurations: Other Desktop Macintosh

What are the memory configurations for desktop Macintosh computers?
This article has been archived and is no longer updated by Apple.
The tables in this article show the memory configurations for desktop Macintosh computers. For information about upgrading the memory in another Macintosh computer, refer to the following TIL articles:

Note: The following computers are not 32-bit clean. They require the 32-bit System Enabler for System 7.1 or the MODE32 Version 7.5 for System 7.5.x in order to run in 32-bit mode and take advantage of more than 8 MB of physical RAM: Macintosh SE/30, II, IIx, and IIcx.

Note: Memory interleaving is supported in the Macintosh Quadra 800 and 650 computers when SIMMs are installed in pairs.

Macintosh RAM Configurations: Compact Macintosh Models

Computer
Soldered RAM (MB)
No. of SIMM/ DIMM Slots
Supported SIMM/ DIMM Sizes (MB)
DRAM Configs (MB)
RAM Speed (ns)
RAM Type
Max. RAM (MB)
Install in Groups of
128
128K
0
N/A128K
N/A
N/A
N/A
512K/512KE
512K
0
N/A512K
N/A
N/A
N/A
2
Plus
0
4
256K, 11, 2.5, 4
150
30-pin SIMM
4
2
SE
0
4
256K, 11, 2, 2.5, 4
150
30-pin SIMM
4
2
SE/30
0
8
256K, 1, 41, 2, 4, 5, 8, 16,17,20,32
120
30-pin SIMM
32
4
Classic
1
2
256K, 11, 2, 2.5, 4
150
30-pin SIMM
4
2
Classic II,
Performa 200
2
2
1,2,42, 4, 6, 10
100
30-pin SIMM
10
2
Color Classic
4
2
1,2,44, 6, 8, 10
100
30-pin SIMM
10
2

Macintosh RAM Configurations: Macintosh II Models
Computer
Soldered RAM (MB)
No. of SIMM/ DIMM Slots
Supported SIMM/ DIMM Sizes (MB)
DRAM Configs (MB)
RAM Speed (ns)
RAM Type
Max. RAM (MB)
Install in Groups of
II
0
8
256K,1,4,161, 2, 4, 5, 8, 16, 17, 20, 32, 64, 65, 68, 80,128
120
30-pin SIMM
128
4
IIx
0
8
256K,1,4,161, 2, 4, 5, 8,16,17,20,32, 64, 65, 68,80,128
120
30-pin SIMM
128
4
IIcx
0
8
256K,1,4,161, 2, 4, 5, 8, 16, 17, 20, 32, 64, 65, 68,80,128
120
30-pin SIMM
128
4
IIci
0
8
256K,512K,1,2,4,161,2,3,4,5,6,8, 9, 10, 12, 16, 17, 18, 20, 24, 32 to 128
80
30-pin SIMM
128
4
IIfx
0
8
1,4,164,8,16, 20, 32 to 128
80
64-pin SIMM
128
4
IIsi
1
4
256K,512K,1,2,41, 2, 3, 5, 9, 17
100
30-pin SIMM
17
4
IIvi,IIvx,
Performa 600
4
4
256K,1,2,4,164, 5, 8, 12, 20, 68
80
30-pin SIMM
68
4

Macintosh RAM Configurations: LC & Performa Models
Computer
Soldered RAM (MB)
No. of SIMM/ DIMM Slots
Supported SIMM/ DIMM Sizes (MB)
DRAM Configs (MB)
RAM Speed (ns)
RAM Type
Max. RAM (MB)
Install in Groups of
LC
2
2
1,2,42, 4, 6, 10
100
30-pin SIMM
10
2
LC II
2
2
1,2,42, 4, 6, 10
100
30-pin SIMM
10
2
Performa 400, 405, 410, 430
4
2
1,2,44, 6, 8, 10
100
30-pin SIMM
10
2
LC III,
Performa 450,460, 466,467
4
1
1,2,4,8,16,324, 5, 6, 8, 12, 20, 36
80
72-pin SIMM
36
1
LC 475,
Quadra 605,
Performa 475, 476
4
1
1,2,4,8,16,324, 5, 6, 8, 12, 20, 36
80
72-pin SIMM
36
1
LC 520
4
1
1,2,4,8,16,324, 5, 6, 8, 12, 20, 36
80
72-pin SIMM
36
1
LC 550,
Performa 550, 560
4
1
1,2,4,8,16,324, 5, 6, 8, 12, 20, 36
80
72-pin SIMM
36
1
LC 575,
Performa 575, 577, 578
4
1
1,2,4,8,16,324, 5, 6, 8, 12, 20, 36
80
72-pin SIMM
36
1
LC 580,
Performa 580, 631
4
2
Inside slot:
1, 4, 16
Outside slot: 1,2,4,8,16,32		6, 7, 9, 10, 12, 13, 21, 22, 24, 28, 36, 37, 40, 46, 52
80
72-pin SIMM
52
1
LC 630, Quadra 630, Performa 630, 635, 636, 637, 638
4
1
1,2,4,8,164, 8, 20, 36
80
72-pin SIMM
36
1
LC 630 DOS Compatible, Performa 640 DOS
4
2+ (1 on DOS card)
1,2,4,8,16,324, 5, 6, 8, 12, 20, 36, 52
80
72-pin SIMM
52
1


Macintosh RAM Configurations: Macintosh Quadra & Centris Models
Computer
Soldered RAM (MB)
No. of SIMM/ DIMM Slots
Supported SIMM/ DIMM Sizes (MB)
DRAM Configs (MB)
RAM Speed (ns)
RAM Type
Max. RAM (MB)
Install in Groups of
Centris 610
4
2
4,8,16,324, 8, 12, 20, 28, 36, 40, 44, 52, 68
80
72-pin SIMM
68
1,2
Quadra 610
4
2
4,8,16,32, non-4, 8, 12, 20, 28, 36, 40, 44, 52, 68
80
72-pin SIMM
68
1,2
Centris 650
4 or 8
4
4,8,16,324, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48, 52, 56, 60, 64, 68, 72, 76, 80, 84, 88, 92, 100, 104, 108, 116, 132
80
72-pin SIMM
132
1,2
Quadra 650
8
4
4,8,16,328, 12, 16, 20, 24, 28, 32, 36, 40, 48, 52, 56, 60, 64, 68, 72, 76, 80, 84, 88, 108, 112, 120, 136-169
80
72-pin SIMM
169
1,2
Centris/Quadra 660AV
8
2
4,8,16,324, 8, 12, 20, 36, 68
70
72-pin SIMM
68
1,2
Quadra 700
4
4
1,44, 8, 20
80
30-pin SIMM
20
4
Quadra 900
0
16
1,44, 8, 12, 16, 20, 24, 28, 32, 36, 40, 48, 52, 64
80
30-pin SIMM
64
4
Quadra 950
0
16
1,44, 8, 12, 16, 20, 24, 28, 32, 36, 40, 48, 52, 64
80
30-pin SIMM
64
4
Quadra 800844,8,16,328, 12, 16, 20, 24, 28, 32, 36, 40, 42, 48, 52, 56, 60, 64, 68, 72, 76, 80, 84, 88, 92, 96, 104, 108, 112, 120, 1366072-pin SIMM1361,2
Quadra 840AV044,8,16,324, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48, 52, 56, 60, 64, 68, 72, 76, 80, 84, 88, 92, 96, 100, 104, 108, 112, 116, 120, 124, 1286072-pin SIMM1281,2
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