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Macintosh Specs

(Up to OJB's Mac Info Page)


This table summarises the performance of Mac models (especially older models). For an explanation of these figures see the notes below the table. Some of the data is estimated, I apologise if any is inaccurate, contact me if you find any errors.

Here's the table...

Model CPU FPU MHz Bus Speed RAM Disk Slots Video
Power G5/2Gx2G5x2int400064120004096FU332 on 21 (9600)
iMac G5G5int20006460002048FU-32 on 17 (9600)
Power G4/1Gx2G4x2int20006455001536FU332 on 21 (4)
Power G4/933G4int9336427001536FU332 on 19 (3)
iMac G4G4int8006424001024FU-32 on 17 (2)
iMac 700G3int7006415001024FU-32 on 15 (2)
Power G4/450G4int4506412002048FU332 on 17 (2)
iMac 233G3int23364500512U-32 on 15 (1)
Power G3/233G3int2336450076812332 on 15 (1)
Power 8600/200604eint20064280102410332 on 17
Power 7200/120601int120641205128.0332 on 14
Power 8100av601int8064902648.0232 on 17
Power 7100av601int6664751368.0232 on 17
Power 6100av601int606465725.0216 on 14
Centris 840av68040int4032351285.0332 on 14
Quadra 65068040int3332291365.0316 on 14
WGS 9568040int3332292565.0532 on 14
WGS 8068040int3332291365.0116 on 14
Quadra 80068040int3332291365.0116 on 14
Quadra 95068040int3332292565.0532 on 14
Quadra 61068040int253222685.0116 on 14
Quadra 660av68040int253222685.0116 on 14
LC 47568040*-253222365.0116 on 14
Quadra 60568040*-253222365.0116 on 14
Centris 660av68040int253222685.0116 on 14
Centris 65068040int2532221365.0116 on 14
Quadra 90068040int2532222565.0532 on 14
Quadra 70068040int253222685.0232 on 14
WGS 6068040*-203218685.0116 on 14
Centris 61068040*-203218685.0116 on 14
Duo 270c680306888233328.0321.5-4
Duo 2506803068882*33328.0241.5-4 gray
PB180c680306888233328.0141.5-8 on 14*
PB165c680306888233328.0141.5-8 on 14*
Duo 2306803068882*33328.0241.5-4 gray
PB180680306888233328.0141.5-4 gray
Mac TV68030-32*327.281.5-8 on 14
IIvx680306888232*327.2681.5-16 on 14
PB16568030-25328.0141.5-4 gray
LC 5206803068882*25326.3361.5-16 on 14
LC III6803068882*25326.3361.5-16 on 14
Duo 2106803068882*25326.3241.5-4 gray
PB16068030-25326.3141.5-4 gray
IIci680306888225326.31281.2-8 on 14
IIsi6803068882*20325.1171.2-8 on 14
IIvi6803068882*16324.3681.5-4 on 14
Color Classic6803068882*16323.9101.2-4 on 14
LC II68030-16163.9101.5-4 on 14
Classic II68030-16163.9101.2-B&W
LC68020-16162.6101.5-4 on 14


CPU refers to central processing unit, the most important component of a computer. Apple used Motorola 680x0 processors for all Macs until they introduced the Power Macs which use the RISC PowerPC (PPC) processor jointly developed by IBM, Motorola and Apple. A * in this column means the CPU is the "cut down" version without a built-in FPU. Double processor machines have "x2" in this column.

FPU refers to floating point unit or maths co-processor. "int" means one is integrated into the main CPU, none means the machine has no FPU, floating point maths is performed by software instead. A * in this column means the FPU is optional, it is not supplied with every machine of this type.

MHz refers to the speed (in MegaHertz, or millions of cycles per second) of the main processor. If there is a * next to the speed it indicates the CPU runs at double the speed of the rest of the computer, therefore the full benefits of the CPU's speed are not gained. Multiple processor machines have the combined speed of the processors (eg a twin 1GHz machine is shown as 2000).

Bus refers to the width of the computer's bus. The bus is the set of "tracks" on the main circuit board that carries information to and from the CPU. The wider the bus is the more information can be moved at one time.

Speed is an approximate measure of the computer's CPU speed. Similar to MIPS but with a few extra factors thrown in to allow for other featyures. The basic "clock" speed of the CPU isn't a reliable measure of the computers real speed because different CPUs can do more or less in one cycle. For example a 68040 running at 32 MHz is far faster than a 68030 running at the same speed. Note that the speed of G4 computers is considerably greater than G3s but only if the AltiVec unit is used.

RAM is the maximum amount of RAM (Random Access Memory) that can be installed. Of course large amounts of memory are very expensive and few Mac users ever need there machines maximum capacity.

Disk refers to the approximate data transfer rate (in megabytes per second) for SCSI-based machines. A "F" here indicates the machine has Firewire (400 Mb/s) and "U" means USB (11 Mb/s).

Slots refers to the number of expansion slots in the machine. Expansion slots can be used to add extra hardware such as network, video and co-processor cards. If there is one it will be a PDS (processor direct slot). If there is more than one they will be Nubus slots.

Video indicates the built-in video capabilities of the machine. The first number is the bit-depth supported (32 means millions of colors, 16 thousands, 8 is 256 colors, 4 is 16 colors). The second number is the screen size this is supported for (14 is the standard 14 inch monitor at 640x480 resolution, 15 means a typical 15" 832x624 monitor, 17 means a 17" 1024x768 monitor). The code in brackets refers to the video hardware: 1 means ATI Rage (64), 2 means ATI Rage 128, 3 means NVidia GeForce, 4 means GeForce 4, 9600 means Radeon 9600.

A * next to the screen size indicates the smaller 640x400 resolution. Generally increasing the screen size decreases the number of colors available. B&W means the machine can only support black and white, if there is a ** next to this the computer can support color if you add a card.


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