Apple Macintosh LC 580 vs Apple Macintosh LC III

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Macintosh LC 580 compared with Macintosh LC III

	AppleMacintosh LC 580	AppleMacintosh LC III
Overview
Released
Released	1995	1993
Performance
Processor
Processor	Motorola 68LC040 33 MHz (Macintosh LC 575)	68030 25 MHz (Macintosh LC III)
CPU cores
CPU cores	1	1
Memory
Memory	8 MB (better)	4 MB
Storage
Storage	500 MB (better)	80 MB to 160 MB
CPU
CPU	Original Motorola 68LC040 at 33 MHz, without an integrated floating-point unit. Apple catalogue gives 66/33 MHz internal/bus clock; optional PowerPC upgrade is excluded from this configuration. Shared Service Source describes it as an updated LC 575	25 MHz Motorola 68030 with integrated memory-management unit, 32-bit data path and 0.5 KB L1 cache; optional 68882 floating-point coprocessor
GPU
GPU	Built-in video uses 1 MB DRAM soldered to the logic board, displaying 32,768 colours at 640 × 480	Built-in video with 512 KB VRAM supports 8-bit colour at 640 × 480 and 832 × 624; upgrading to 768 KB raises both to 16-bit colour
Memory type
Memory type	8 MB standard in the maker catalogue: 4 MB soldered plus one 4 MB SIMM, with a second socket free. Two 72-pin 80 ns SIMM sockets, expandable to 52 MB; the single-bank socket accepts only 1, 4 or 16 MB modules. 1 MB ROM in original service specifications	4 MB on the logic board and one 72-pin SIMM slot; Apple supports 4–36 MB total with 80 ns memory
Storage type
Storage type	500 MB internal IDE hard disk in the catalogue configuration, plus manual-inject Apple SuperDrive floppy. Double-speed tray-loading internal CD-ROM is optional or included in some regional configurations; the separately marketed Performa 580CD has its own software and hardware bundle	Internal 1.44 MB floppy drive and 80 or 160 MB internal SCSI hard drive
Expansion slots
Expansion slots	One 114-pin LC processor-direct slot, one communications slot for optional Ethernet or fax modem, one video-input slot for optional capture hardware and an internal connector for optional external video	One LC III processor-direct slot
Display
Screen size
Screen size	14″	None built in
Resolution
Resolution	640 × 480	–
Panel
Panel	CRT	–
Refresh rate
Refresh rate	66.67 Hz	–
Display type
Display type	Built-in 14-inch diagonal shadow-mask colour CRT, 0.28 mm dot pitch. The exact service manual calls the viewable image 11.5 inches and gives a nominal 240 × 180 mm active raster; these maker descriptions are retained separately	–
Display features
Display features	640 × 480 at 66.67 Hz in the exact timing table (66.7 Hz rounded elsewhere in the same manual); 16-bit colour	–
Connections
Ports
Ports	Headphone jack	–
Front ports
Front ports	Stereo headphone socket; front brightness and contrast controls	–
Back ports
Back ports	One ADB port; one DB-25 SCSI port supporting six external devices; two RS-232/RS-422 serial ports, with 9-pin mini-DIN modem and 8-pin mini-DIN printer connectors; mono sound input and stereo sound output	Apple Desktop Bus, DB-15 video, DB-25 SCSI, printer and modem serial ports, microphone input and speaker output; no built-in Ethernet
External displays
External displays	Optional external video connector supports mirroring on compatible 640 × 480 and 800 × 600 monitors, as listed in the shared service manual; no external video socket as standard	Built-in video supports up to 832 × 624 pixels; colour depth depends on fitted VRAM
Speakers
Speakers	Two integrated speakers; 8-bit stereo playback and mono recording at 11 or 22 kHz. Optional CD-ROM supports audio-CD playback	Internal speaker
Microphones
Microphones	Integrated microphone for monaural sound input	–
Keyboard and mouse
Keyboard and mouse	Supports Apple Desktop Bus keyboards and the ADB Mouse II. Maker photograph shows a keyboard and mouse; regional education bundles vary	–
Design and power
Type
Type	All-in-one	Compact
Weight
Weight	18.3 kg	3.99 kg (better)
Width × depth × height
Width × depth × height	343 × 419 × 455 mm	310 × 389 × 74 mm
Operating system
Operating system	macOS	macOS
Size and weight detail
Size and weight detail	Apple catalogue: 455 × 343 × 419 mm (height × width × depth), 18.3 kg, varying with installed devices. Service Source rounds the same 17.9 × 13.5 × 16.5 inch case to 455 × 344 × 420 mm and 18.4 kg; headline follows the catalogue’s published metric values	Apple's 2.9 × 12.2 × 15.3 inch and 8.8 lb reference dimensions; metric fields are rounded conversions
Power supply
Power supply	Automatically configured 100–240 V AC mains; service supply operating range 90–264 V rms, 50–60 Hz ±3 Hz	Maximum 50 W; 100–240 V AC, 47–63 Hz; 3.6 V lithium clock battery
Power use
Power use	Service Source: 120 W maximum for all line and load conditions. Current support article describes a PowerPC-upgraded configuration and lists 60 W, so that figure is not transferred to the original model	–
In the box
In the box	Original 68LC040 model is offered in Apple’s April and October 1995 catalogues; the latter identifies US education-only sales and varying worldwide configurations. Current Apple support article describes an installed PowerPC 601 upgrade card. It records introduction on 3 April 1995, while contemporary Macworld says education shipping was planned for that day; exact actual first retail delivery is unconfirmed, so release retains supported year precision	Original System Software 7.1. Apple lists 10 February 1993 as introduction; a separate maker first-sale date was not established.