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.

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 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.

Specs (via Low End Mac)

• Cpu: 33 MHz 68040
• Fpu: built into 68040 CPU
• Performance: 12.5 (relative to SE); 10.00, MacBench 2.0 CPU see Benchmarks: Quadra 630 for more details
• Rom: 1 MB
• Hard Drive: 250 MB IDE (first desktop Mac with an IDE hard drive rather than a SCSI drive)
• 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
• Addressing: 24-bit, 32-bit
• Gestalt Id: 98
• Upgrade Path: Power Mac PDS card , 6300-series motherboard
• Adb: 2 ports for keyboard and mouse
• Scsi: DB-25 connector on back of computer
• Serial: 2 DIN-8 RS-422 ports on back of computer
• Pram Battery: 4.5V alkaline
• Weight: 19 lbs.
• See: Online resources and links for the Quadra 630
• 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.