Creating a midpoint between the Mac II line and the Quadra series, the short-lived Centris models were introduced in February 1993. The Centris 650 uses the same chassis as the IIvx , IIvi , and Performa 600 .

Some models came with a 68LC040 (no math coprocessor), only 4 MB RAM, and no ethernet. Most use the full 68040 and have ethernet, as well as 8 MB of motherboard RAM.

“Going along with the auto-marketing trend toward meaningless names that sound important, Apple’s new Centris line will serve as the company’s mainstream, midlevel computers.” MacUser, April 1993 (Apple names included Quadra, Performa, and Centris.)

Specs (via Low End Mac)

• Cpu: 25 MHz 68040 or 68LC040
• Performance: 12.0, relative to SE; 0.99, Speedometer 4; 22 MIPS
• Ram: 4 MB or 8 MB on motherboard, expandable by 128 MB using four 80ns 72-pin SIMMs; motherboard had 4 SIMM slots which can be filled individually but should ideally be filled in neioghboring pairs to take advantage of interleaved memory; can use 4 MB, 8 MB, 16 MB, and 32 MB SIMMs
• Rom: 1 MB
• L2 Cache: optional, PDS
• Hard Drive: 80, 230, or 500 MB
• Video: 512 KB VRAM, expandable to 1 MB 512 x 384 @ 16-bit 640 x 480, 800 x 600, 832 x 624: 8-bit @ 512 KB, 16-bit @ 1 MB 832 x 624, 1024 x 768, 1152 x 870: 4-bit @ 512 KB, 8-bit @ 1 MB
• Addressing: 24-bit or 32-bit
• Gestalt Id: 30
• Upgrade Path: Quadra 650 , Power Mac PDS card, Power Mac 7100
• Adb Ports: 2
• Scsi: DB-25 connector on back of computer
• Pram Battery: 3.6V half-AA
• Weight: 25 lbs.
• Din-8 Serial Ports: 2
• Nubus 90 Slots: 3
• See: Online resources and links for the Centris 650