Initially introduced as the Centris 660av (the two models are identical except for the nameplate), the Quadra 660av shares the same case design as the Centris 610 .

In addition to a faster 25 MHz 68040 CPU, the 660av includes a 55 MHz AT&T digital signal processor, introduces the GeoPort high speed serial port, has a new audio-video connector on rear, and can digitize video using built-in ports. (For even more AV horsepower, look into the 40 MHz Quadra 840av .)

A dead or low-voltage PRAM battery can temporarily kill off built-in video – see Macintosh Computers: Low Battery Can Cause No Video for more information.

Specs (via Low End Mac)

• Cpu: 25 MHz 68040 CPU
• Performance: 12.4, relative to SE; 0.89, Speedometer 4 see Benchmarks: 660av for more details
• Ram: 8 MB, expandable to 68 MB using 70ns 72-pin SIMMs; motherboard has 2 SIMM slots which can be filled independently. Cannot use 64 MB SIMMs
• Rom: 2 MB
• L2 Cache: optional
• Hard Drive: 230 or 500 MB
• Vram: 1 MB
• Addressing: 24-bit or 32-bit
• Gestalt Id: 53
• Upgrade Path: Power Mac 6100
• 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: 3.6V half-AA
• Weight: 14 lb.
• Dsp: 55 MHz 3210
• See: Online resources and links for the Centris 660av (Quadra 660av)