Performa 630 and LC 630

This was the last Mac designed around the 68040 processor. The Quadra 630 was designed to replace the Quadra 610.

Performa 630The LC 630 and Performa 63x versions use the less expensive 68LC040, which doesn’t have an FPU, while the Quadra 630 sports a full 68040. The slide-out motherboard makes upgrades very easy.

The Performa version had a huge number of model names:

  • 630, no CD-ROM
  • 630CD, same as LC 630
  • 630CD DOS Compatible
  • 631CD, same as 630CD but with 8 MB RAM and a second RAM slot, bundled with modem and display
  • 635CD, same as 630CD but with 5 MB RAM, bundled with modem and display
  • 636, same as 635CD, but no CD-ROM or display, 8 MB RAM
  • 636CD, same as 636 but with CD-ROM, higher education market only
  • 637CD, same as 636CD but bundled with display, higher education only
  • 638CD, same as 637CD but without a display, includes TV tuner/video input card
  • 638CD/V, same as 638CD but with a TV tuner and multiscan display
  • 640CD DOS Compatible, same as 631CD with 486-based DOS card but no display

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

The 630 was quite cleverly designed for a computer with no industry standard slots. It contained 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 card plugged into the CPU socket and also used the PDS, but it left the comm and video slots free.

The Performa/LC 630 comes from the factory with a single SIMM socket, but it you’re handy with a soldering iron, you can add a second and support up to 52 MB total system memory.


  • Performa 63x introduced 1994.07.15; discontinued
  • LC 630 introduced 1994.07.18; discontinued 1995.04.03
  • requires System 7.1P or later; highest version supported without a PPC upgrade is Mac OS 8.1.
  • CPU: 33 MHz 68LC040
  • Performance: 12.5 (relative to SE); 10.00, MacBench 2.0 CPU
    see Benchmarks: Quadra 630 for more details
  • FPU: none in LC or Performa, can be added by replacing 68LC040 CPU with 68040
  • 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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