Apple Mac Quadra 630

Apple Mac Quadra 630SCSI had been favoured by Apple ever since it had first incorporated a Hard Disk Drive inside the Macintosh SE.  Although both reliable and fast, SCSI was significantly more expensive than the near industry standard IDE/ ATA (Integrated/Intelligent Drive Electronics) system. Similarly, SCSI drive sizes tended to be smaller capacity. With Macintosh Clones already employing the IDE interface, and doing so quite effectively, Apple decided to follow in their footsteps with the Quadra 630. Whilst being an obvious step forward, the persistent inclusion of a full SCSI interface and SCSI optical drive, in addition to IDE, baffled many in the industry. Likewise the continued necessity to produce three variants of the same product namely the Quadra 630, Performa 630 and LC 630  remained unclear to many.

Design Innovation:

The change in drive technology wasn’t the only ‘first’ that the 630 introduced. Its new low-profile case was specifically designed so that the the motherboard could be easily slid out and accessed – significantly different to the inaccessible systems that came before it. The optional video expansion system was also a first, allowing end users to add video input, a TV tuner and video output (PAL and NTSC). Even though the three sockets were all bespoke, the machine did include a single extended LC PDS slot which allowed more ‘conventional’ cards to be added, as well.


Running a 32 Bit Motorola 68040 at 33 MHz, on a 33mHz bus and incorporating an FPU, the Quadra 630 was a respectable computer. The Processor (and it’s speed) hadn’t improved since the inception of the Quadra 950, some 2 years earlier and the Quadra 800 a year after that. Whilst seemingly breaking breaking Moors Law and leaving Apple with a sluggish machine, lagging behind the PC market, it was in effect a low end computer, with Apple having recently introduced the Power Macintosh 6100 and Power Mac 7100.


Released with all of 4MB of on-board memory,  a single 72-pin DIMM slot (although the Performa 631 sported two slots) allowed expansion of the memory to 36 MB through the addition of a 32 MB module. However, users soon discovered that the addition of a 64MB module would also increase the capacity to a total 68MB ram without any adverse effects..


The computer shipped with  a 250 MB  hard drive, a 1.44MB floppy disk drive and a 2 x Apple CD rom drive.  The IDE based hard drive interface meant that users could upgrade the unit using off-the-shelf solutions.  However, the use of third party optical drives meant that solutions such as ROXIO (Now ROVI) Toast had to be employed.

Video & Graphics:

The Quadra 630 sported 1 MB of onboard 60 ns DRAM  for video function and offered support for a single display up to 604×480 in resolution.  However, a second one could be incorporated with the addition of an LC PDS video card. With the internal VRAM, the system was capable of supporting 512×384 and 640×480 at 16-bit color and 800×600 and 832×624 at 8-bit color. The internal video could not be upgraded.

Ports & Connectivity:

This model has a single LC PDS, Comm, TV, and both video input and video output expansion slots. In the PC compatible configuration, the PDS slot is occupied.  It also incorporated a single DB-15 video out port, ADB port, DB-25 SCSI port, 2 x Serial ports (printer & Modem), a plaintalk microphone port, 8 bit stereo output port and front mounted headphone port.

Introduction Date: July 15, 1994 Discontinued Date: October 5, 1995
Processor Speed: 33 MHz Processor Type: 68040
Processor Upgrade: N/A FPU: Integrated
System Bus Speed: 33 MHz Cache Bus Speed: N/A
ROM/Firmware Type: Macintosh ROM ROM/Firmware Size: 1 MB
L1 Cache: 8k L2 Cache: N/A
RAM Type: 72-pin SIMM Min. RAM Speed: 80 ns
Details: N/A
Standard RAM: 4 MB Maximum RAM: 36 MB
Motherboard RAM: 4 MB RAM Slots: 1
Video Card: Dedicated VRAM Type: Onboard
Standard VRAM: 1 MB Maximum VRAM: 1 MB
Display Support: Single Display Resolution Support: 640×480
Standard Hard Drive: 250 MB Int. HD Interface: IDE
Standard Optical: 2X CD-ROM (Optional) Standard Disk: 1.44 MB (Manual)
Standard Modem: 14.4 (Optional) Standard Ethernet: AAUI-15 (Optional)
Expansion Slots: 1 LC PDS, Comm, Video I/O, TV Expansion Bays: None
Case Type: Desktop Form Factor: Macintosh Quadra 630
Apple Order No: M3491LL/A Apple Subfamily: Macintosh Quadra 630
Details: N/A
Apple Model No: M3076 Gestalt ID: 98
Battery Type: 4.5V Alkaline Battery Life: N/A
Original Mac OS: System 7.1.2P Supported Mac OS: 7.1.2P-7.5.1, 7.5.3-8.1
Dimensions: 4.3 x 12.6 x 16.5 Avg. Weight: 19.0 lbs (8.6 kg)