Memory Configurations: Other Desktop Macintosh

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:

• Memory Configurations: Power Macintosh
• Memory Configurations: Servers
• Memory Configurations: Portables & PowerBook

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/A	128K	N/A	N/A	N/A
512K/512KE	512K	0	N/A	512K	N/A	N/A	N/A	2
Plus	0	4	256K, 1	1, 2.5, 4	150	30-pin SIMM	4	2
SE	0	4	256K, 1	1, 2, 2.5, 4	150	30-pin SIMM	4	2
SE/30	0	8	256K, 1, 4	1, 2, 4, 5, 8, 16,17,20,32	120	30-pin SIMM	32	4
Classic	1	2	256K, 1	1, 2, 2.5, 4	150	30-pin SIMM	4	2
Classic II, Performa 200	2	2	1,2,4	2, 4, 6, 10	100	30-pin SIMM	10	2
Color Classic	4	2	1,2,4	4, 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,1,4,16	1, 2, 4, 5, 8, 16, 17, 20, 32, 64, 65, 68, 80,128	120	30-pin SIMM	128	4
IIx	0	8	256K,1,4,16	1, 2, 4, 5, 8,16,17,20,32, 64, 65, 68,80,128	120	30-pin SIMM	128	4
IIcx	0	8	256K,1,4,16	1, 2, 4, 5, 8, 16, 17, 20, 32, 64, 65, 68,80,128	120	30-pin SIMM	128	4
IIci	0	8	256K,512K,1,2,4,16	1,2,3,4,5,6,8, 9, 10, 12, 16, 17, 18, 20, 24, 32 to 128	80	30-pin SIMM	128	4
IIfx	0	8	1,4,16	4,8,16, 20, 32 to 128	80	64-pin SIMM	128	4
IIsi	1	4	256K,512K,1,2,4	1, 2, 3, 5, 9, 17	100	30-pin SIMM	17	4
IIvi,IIvx, Performa 600	4	4	256K,1,2,4,16	4, 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	1,2,4	2, 4, 6, 10	100	30-pin SIMM	10	2
LC II	2	2	1,2,4	2, 4, 6, 10	100	30-pin SIMM	10	2
Performa 400, 405, 410, 430	4	2	1,2,4	4, 6, 8, 10	100	30-pin SIMM	10	2
LC III, Performa 450,460, 466,467	4	1	1,2,4,8,16,32	4, 5, 6, 8, 12, 20, 36	80	72-pin SIMM	36	1
LC 475, Quadra 605, Performa 475, 476	4	1	1,2,4,8,16,32	4, 5, 6, 8, 12, 20, 36	80	72-pin SIMM	36	1
LC 520	4	1	1,2,4,8,16,32	4, 5, 6, 8, 12, 20, 36	80	72-pin SIMM	36	1
LC 550, Performa 550, 560	4	1	1,2,4,8,16,32	4, 5, 6, 8, 12, 20, 36	80	72-pin SIMM	36	1
LC 575, Performa 575, 577, 578	4	1	1,2,4,8,16,32	4, 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	1,2,4,8,16	4, 8, 20, 36	80	72-pin SIMM	36	1
LC 630 DOS Compatible, Performa 640 DOS	4	2+ (1 on DOS card)	1,2,4,8,16,32	4, 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	4,8,16,32	4, 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	4,8,16,32	4, 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	4,8,16,32	8, 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	4,8,16,32	4, 8, 12, 20, 36, 68	70	72-pin SIMM	68	1,2
Quadra 700	4	4	1,4	4, 8, 20	80	30-pin SIMM	20	4
Quadra 900	0	16	1,4	4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 48, 52, 64	80	30-pin SIMM	64	4
Quadra 950	0	16	1,4	4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 48, 52, 64	80	30-pin SIMM	64	4
Quadra 800	8	4	4,8,16,32	8, 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, 136	60	72-pin SIMM	136	1,2
Quadra 840AV	0	4	4,8,16,32	4, 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, 128	60	72-pin SIMM	128	1,2