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Macintosh Quadra 630

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Macintosh Quadra 630
Macintosh Quadra 630 Apple product photo
Macintosh Quadra 630 with CD-ROM drive (Apple product photograph)
Specifications
ManufacturerApple Computer, Inc.
TypeDesktop personal computer
ReleasedJuly 18, 1994
DiscontinuedApril 17, 1995
Intro priceUS$1,280
CPUMotorola 68040 at 33 MHz, with FPU
Memory4 MB on the logic board; one 72-pin SIMM slot, 36 MB maximum (52 MB on the two-slot board)
Storage250 or 350 MB IDE hard disk; 1.4 MB manual-insert SuperDrive; optional internal CD-ROM
DisplayBuilt-in video, 1 MB DRAM frame buffer (not expandable)
Sound8-bit mono input; 8-bit stereo output (16-bit in CD mode)
ROM1 MB
ExpansionLC-style PDS, communications slot, video-in slot, TV tuner connector
Power45 W, 100-240 V AC
Dimensions10.95 × 41.95 × 32 cm (4.3 × 16.5 × 12.6 in)
Weight7.7 kg (17 lb) without CD-ROM; 8.6 kg (19 lb) with
OS / FirmwareSystem 7.1.2P to Mac OS 8.1
PredecessorMacintosh Quadra 610
SuccessorPower Macintosh 6200
Model no.M3076

The Macintosh Quadra 630 is a desktop Macintosh introduced by Apple on July 18, 1994 and discontinued on April 17, 1995.[1] It is the 630 design sold under the Quadra name: the Macintosh LC 630, Macintosh LC 630 DOS Compatible and Macintosh Performa 630 series use the same logic board family and case. Apple's Service Source separates them by processor: the LC 630 has a 68LC040, and the Quadra 630 a full 68040 with its floating-point unit, both at 33 MHz.[2] Apple's technical specifications also list the Quadra 630 with an integrated FPU.[1]

Identification

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Item Value
Model number M3076[3]
Order number M3491LL/A[3]
Gestalt ID 98[1]
ROM 1 MB, ID $067C, version $21[1]
Original system software System 7.1.2P with System Enabler 405[1]

Memory and storage

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  • RAM: 4 MB on the logic board, 8 MB optional. Boards with one SIMM slot (661-0158) take up to 36 MB; boards with two slots, one of them for a single-sided SIMM (661-1114), take up to 52 MB. SIMMs are 72-pin, 80 ns or faster.[2]
  • Video: the frame buffer is 1 MB of DRAM, and Apple states that the 630 machines do not support video memory expansion.[2]
  • Hard disk: 250 or 350 MB on the internal IDE interface. Apple notes IDE was new to its products and that the 630 machines do not support internal SCSI hard disks; IDE drives are replaced like for like.[2]
  • Floppy: 1.4 MB Apple SuperDrive, manual insert. An Apple 300i Plus CD-ROM drive was optional.[2]

Video

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Apple supports 12-, 13- and 14-inch monitors, the 15-inch multiple-scan monitor and VGA at up to 16 bits per pixel, and the Apple 16-inch and SVGA (800 × 600) monitors at up to 8 bits per pixel.[2]

Maximum depth with the 1 MB frame buffer (Apple)
Resolution Bits per pixel
512 × 384 16
640 × 480 16
800 × 600 8
832 × 624 8

Apple notes that video input is not supported at 832 × 624.[1]

Sound, ports and expansion

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  • Sound: 8-bit mono input for a microphone or line-level source (with bias current for an electret microphone); 8-bit stereo output, 16-bit in CD mode, nominally 0.5 V RMS into 39 ohms; stereo output jacks at the front and rear; the internal speaker mutes when a plug is inserted.[2]
  • Ports: two RS-232/422 serial ports (mini DIN-8), one external SCSI port (DB-25), one ADB port, DB-15 video on the video daughterboard.[2]
  • Slots: one 114-pin LC-compatible processor-direct slot; one 112-pin communications slot for a modem or Ethernet card; one 60-pin video-in slot for real-time display, capture and overlay; a 10-pin TV tuner connector.[2] There is no built-in Ethernet.[1]
  • Controls: soft power from the keyboard, front-panel volume buttons and headphone jack, optional infrared remote.[2]

The Service Source gives the external SCSI limit as six devices in its specifications and seven in its overview.[2] Apple's Macintosh Processor Upgrade (PowerPC 601) fits the 630 series.[4]

Power and battery

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Apple rates the machine at 45 W maximum, not including the monitor, from 100-240 V AC at 50-60 Hz.[2] Apple's technical specifications give the PRAM battery as 4.5 V alkaline, as they do for the LC 630 and Performa 630 series; EveryMac agrees.[1][3] Leakage from an alkaline cell is neutralised with a weak acid such as white vinegar, not bicarbonate. Apple's 630 Service Sources give no battery test voltage or part number.

Service documentation

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General maintenance, capacitors and troubleshooting

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The Quadra 630 shares its board family with the LC 630; use:

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References

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  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 Macintosh Quadra 630: Technical Specifications, Apple—link(accessed 2026-09-30)
  2. ↑ 2.00 2.01 2.02 2.03 2.04 2.05 2.06 2.07 2.08 2.09 2.10 2.11 2.12 Apple Computer, LC 630/Quadra 630/ Performa 640 Service Source, hosted as File:Quadra.lc_630.performa_640.pdf (see LC 630/Quadra 630/ Performa 640 Service Source). Basics, Overview; Specifications, Processor p. 2, Memory pp. 3-4, Disk Storage p. 5, I/O Interfaces pp. 6-8, Sound and Video p. 10, Electrical p. 11, Physical p. 12.
  3. ↑ 3.0 3.1 3.2 Macintosh Quadra 630 Specs, EveryMac.com—link(accessed 2026-09-30)
  4. ↑ Apple, Macintosh Processor Upgrade Service Source, Basics p. 1; see Macintosh Processor Upgrade Service Source.