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Apple Macintosh Centris 660AV vs Apple Macintosh LC III+

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

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AppleMacintosh Centris 660AVAppleMacintosh LC III+
Overview
Released1993–
Performance
ProcessorMotorola 68040 25 MHz (Macintosh Centris 660AV)68030 33 MHz (Macintosh LC III+)
CPU cores11
Memory4 MB4 MB
Storage81.92 MB–
CPU25 MHz Motorola 68040 with integrated floating-point unit, 8 KB L1 cache and 32-bit data path; separate 55 MHz AT&T 3210 digital signal processorMotorola 68030 at 33 MHz with integrated memory management and 32-bit data path; optional socketed 68882, 0.5 KB first-level cache and no second-level cache. Apple Service Guide identifies the Performa 460, 466 and 467 as the 33 MHz LC III family; these aliases are not separate product records
GPUBuilt-in 1 MB VRAM supports 832 × 624 at 16-bit colour or 1152 × 870 at 8-bit colour512 KB built-in VRAM, expandable to 768 KB with a 256 KB SIMM. A 512 KB VRAM SIMM may be fitted but only 256 KB is used. At 640 × 480 and 832 × 624, standard memory supports 8-bit colour; upgraded VRAM supports 16-bit colour
Memory type4 MB soldered memory and two 72-pin SIMM slots; Apple lists 4–68 MB total with 70 ns memory4 MB soldered RAM plus one 72-pin SIMM socket, maximum 36 MB. Apple specifies 80 ns minimum memory speed and SIMM capacities 1, 2, 4, 8, 16 or 32 MB. 1 MB ROM
Storage typeApple developer note lists an 80 MB internal SCSI hard drive in its base configuration; support lists an 80–500 MB range. A 1.44 MB floppy drive is built in; a 2× CD-ROM was an option.Apple LC III+ support lists 80–160 MB internal SCSI hard disks and an automatic-inject 1.44 MB floppy drive. Exact original RAM/drive configuration pairing is unresolved, so structured storage capacity is omitted. Apple July 1994 Service Guide gives conflicting 80 MB and 180 MB values for Performa 460 in different tables; those are not silently assigned to this model. Performa 460-series bundles use a manual-insert SuperDrive
Expansion slotsOne short NuBus card using an optional angle adapter, or a processor-direct cardOne LC III processor-direct expansion slot. Ethernet requires an expansion card; no built-in Ethernet
Display
ScreenNone built inNone built in
Connections
PortsEthernetHeadphone jack
Back portsDB-15 monitor output, Apple Desktop Bus, external DB-25 SCSI, two serial connections including GeoPort, AAUI Ethernet, composite and S-video input and output, sound input and outputOne ADB, DB-15 video, DB-25 SCSI, printer and modem serial ports, omnidirectional microphone input and speaker output. No external floppy connector
External displaysBuilt-in video supports one external monitor at up to 1152 × 870 pixels in 8-bit colourSeparate monitor required. Apple specifies 512 × 384 and 640 × 400 at 16-bit colour, plus 640 × 480 and 832 × 624 with colour depth depending on VRAM capacity
Keyboard and mouse–Performa 460-series bundles include an ADB keyboard and mouse and may include a monitor and modem; the museum photo shows the Performa 460-labelled computer alone. Exact LC III+ supplied-accessory bundle is unpublished in the recovered support record
Design and power
TypeCompactCompact
Operating systemmacOSmacOS
Size and weight detailApple lists 3.4 × 16.3 × 15.6 inches and 14 lbApple LC III+ record publishes 8.8 lb and 2.9 inches high × 12.2 inches wide × 15.3 inches deep. Unpublished metric measurements are omitted
Power supplyMaximum 86 W; 100–240 V AC at 50–60 Hz; 3.6 V lithium clock batteryApple LC III+ support lists 100–240 V, 47–63 Hz, 50 W maximum, 0.42 A and 171 BTU/hour. These are maker ratings, not measured consumption. 3.6 V lithium clock battery
In the boxOriginal System Software 7.1. Apple lists 29 July 1993 as introduction; a separate first-sale date was not established. Apple's developer note gives a 4 MB/80 MB base configuration, while later catalogue sources mention larger bundled options.Original System 7.1 with System Enabler 003 v1.1. Apple introduction date 18 October 1993 is not established as an actual first retail sale, so released is omitted

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