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Apple Macintosh IIci vs Apple Macintosh IIsi

Every spec side by side, from each maker's published figures.

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AppleMacintosh IIciAppleMacintosh IIsi
Overview
ReleasedSeptember 1989October 1990
Performance
Processor68030 25 MHz (Macintosh IIci)68030 20 MHz (Macintosh IIsi)
CPU cores11
Memory1 MB1 MB
Storage40 MB–
CPU25 MHz Motorola 68030 with integrated memory management and 68882 floating-point coprocessor; 0.5 KB L1 cache20 MHz Motorola 68030 with integrated memory management and 0.5 KB L1 cache; 68882 floating-point coprocessor optional through an expansion adapter
GPUBuilt-in video uses 64–320 KB of system RAM and supports 8-bit colour at 512 × 384 or 640 × 480; NuBus graphics cards can also be fittedBuilt-in 8-bit colour video supports 512 × 384 and 640 × 480 using 64–320 KB of system RAM
Memory typeEight 30-pin SIMM slots in two banks of four; 80 ns fast-page memory, 1–128 MB supported by Apple; 512 KB ROM1 MB soldered to the logic board plus four 30-pin SIMM slots in one matched bank; 100 ns memory and 1–17 MB total supported by Apple; 512 KB ROM
Storage typeInternal 1.44 MB floppy drive and space for one 40 or 80 MB SCSI hard drive; Low End Mac documents an original floppy-only offering and a 40 MB hard-drive configurationInternal 1.44 MB floppy drive with SCSI hard-drive options of 40 or 80 MB; Apple does not document the paired RAM and drive configurations on its support sheet
Expansion slotsThree NuBus slots plus a cache/processor-direct connector; Apple's later support sheet lists 32 KB L2 cache, while its original developer note calls the cache card optionalOne processor-direct slot can be used directly or with an optional NuBus adapter; no built-in NuBus slot or L2 cache
Display
ScreenNone built inNone built in
Connections
PortsHeadphone jackHeadphone jack
Back portsTwo Apple Desktop Bus ports, DB-15 video, DB-19 external floppy, DB-25 SCSI, printer and modem serial ports and stereo sound output; no built-in EthernetOne Apple Desktop Bus port, DB-15 video, DB-19 external floppy, DB-25 SCSI, printer and modem serial ports, sound output and microphone input; no built-in Ethernet
External displaysBuilt-in video supports Apple's 12-inch monochrome, 13-inch RGB and 15-inch portrait displays; other displays require a compatible NuBus cardBuilt-in video supports an Apple colour display at 640 × 480 with 8-bit colour; a compatible expansion graphics card can extend display options
SpeakersInternal speaker and stereo 8-bit sound outputInternal speaker, stereo 8-bit sound output and mono audio input
Design and power
TypeCompactCompact
Weight6.2 kg4.5 kg
Width × depth × height302 × 366 × 140 mm315 × 378 × 102 mm
Operating systemmacOSmacOS
Size and weight detailApple's 5.5 × 11.9 × 14.4 inch and 13.6 lb reference dimensions; metric fields are rounded conversionsApple's 4 × 12.4 × 14.9 inch and 10 lb reference dimensions; metric fields are rounded conversions
Power supplyMaximum 159 W; 100–240 V AC, 50–60 Hz; 3.6 V lithium clock battery and keyboard soft powerMaximum 160 W; 100–240 V AC, 50–60 Hz; 3.6 V lithium clock battery and keyboard soft power
In the boxOriginal System Software 6.0.4. Apple lists 20 September 1989 as introduction; Low End Mac reports September availability without a separate first-sale dayOriginal System Software 6.0.7. Apple lists 15 October 1990 as the introduction date; no separate first-sale day was found

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