Quadra 630

The Quadra 630 was the last Mac designed around the 68040 processor. It was designed to replace the Quadra 610. LC and Performa versions of the 630 use the less expensive 68LC040, which lacks an FPU, while the Quadra 630 sports a full 68040. The slide-out motherboard makes upgrades very easy.

Performa 630The 630 was the first desktop Mac to use an IDE hard drive, a type of drive common in the IBM compatible market and less expensive than SCSI drives, instead of Apple’s traditional SCSI hard drive. However, the CD-ROM (when present) is a SCSI device and the 630 retains its external SCSI port.

The 630 was quite cleverly designed for a computer with no industry standard slots. It contains an extended LC PDS that supported both LC and extended LC cards, a comm slot for a modem or ethernet card, and a video slot for either Apple’s Video System Card or TV/Video System card. To top it off, the DOS Compatibility card plugs into the CPU socket and also uses the PDS, but it leaves the comm and video slots free.

The standard Quadra 630 has a single SIMM socket, but if you’re handy with a soldering iron, it’s possible to add a second one.


  • Quadra 630 introduced 1994.07.18 at $1,200; discontinued 1995.04.17
  • requires System 7.1 or later; highest version supported without a PPC upgrade is Mac OS 8.1.
  • CPU: 33 MHz 68040
  • Performance: 12.5 (relative to SE); 10.00, MacBench 2.0 CPU
    see Benchmarks: Quadra 630 for more details
  • FPU: built into 68040 CPU
  • ROM: 1 MB
  • RAM: 4 MB on motherboard, expandable to 68 MB* using one 80ns 72-pin SIMM. The slot supports 1, 2, 4, 8, 16, 32, and 64 MB SIMMs. (The 630 works only with single-banked 64 MB SIMMs, but it does not work with double-banked 64 MB RAM SIMMs.
    The Performa 631, which has two SIMM sockets, is expandable to 76 MB using two 80ns 72-pin SIMMs (one source places the limit at 52 MB).
    * One reader reports installing a 128 MB non-parity 72-pin 80ns SIMM in his 630 and using it reliably.
  • video: 1 MB VRAM, does not support portrait monitor
    • 512 x 384, 640 x 480: 16-bit
    • 800 x 600, 832 x 624: 8-bit
  • ADB: 2 ports for keyboard and mouse
  • serial: 2 DIN-8 RS-422 ports on back of computer
  • SCSI: DB-25 connector on back of computer
  • Hard drive: 250 MB IDE (first desktop Mac with an IDE hard drive rather than a SCSI drive)
  • one LC PDS slot, one comm slot, one video slot, one TV tuner slot
  • size (HxWxD): 4.3″ x 12.6″ x 16.5″
  • Weight: 19 lbs.
  • PRAM battery: 4.5V alkaline
  • Gestalt ID: 98
  • addressing: 24-bit, 32-bit
  • upgrade path: Power Mac PDS card, 6300-series motherboard

Accelerators & Upgrades

Online Resources


  • Internal HD Format: Cannot See IDE Drives (Apple Knowledge Base 18360) notes that due to changes in the way modern IDE drives are formatted at the factory, early versions of Apple HD SC Setup (ones that come with System 7.5.1 and earlier) will not recognize them. You should boot System 7.5.2 or later and use Drive Setup 1.0.3 or higher with these drives.
  • The IDE controller only supports a single device, and the highest PIO mode this model supports is Mode 3 (11.1 MB/s), Macintosh: Using Third Party IDE Hard Disks
  • Macs with IDE hard drives do not provide SCSI termination power, depending on external SCSI devices to provide it. For more details, see SCSI Termination Power.
  • You must have a “fat” system installed to use a PowerPC upgrade.
  • Serial port normally restricted to 57.6 kbps; throughput with a 56k modem may be limited. See 56k modem page. For more information on Mac serial ports, read Macintosh Serial Throughput.

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