personal computer by Apple

Finding the market confused with five product lines (Mac II, Centris, Quadra, Performa, and PowerBook), Apple renamed the Centris models in October 1993. At the same time, the 68040 CPU in the Quadra 650 was boosted to 33 MHz.

The floppy drive mounting sled used in the Mac IIvi , IIvx , Performa 600 , Centris 650 , Quadra 650, and Power Mac 7100 can also be used for a hard drive if you no longer need the floppy drive.

Specs (via Low End Mac)

• Cpu: 33 MHz 68040 CPU
• Performance: 14.6, relative to SE; 21.9, Speedometer 3; 1.19, Speedometer 4; 29 MIPS see Benchmarks: Quadra 650 for more details
• Ram: 4 MB or 8 MB on motherboard, expandable to 132MB or 136MB using 80ns 72-pin SIMMs; motherboard had 4 SIMM slots which can be filled individually but should ideally be filled in interleaved pairs; can use 4 MB, 8 MB, 16 MB, and 32 MB SIMMs
• Rom: 1 MB
• L2 Cache: optional, PDS
• Hard Drive: 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: 36
• Upgrade Path: Power Mac PDS card, Power Mac 7100
• 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: 25 lbs.
• Nubus: 3 NuBus 90 slots
• See: Online resources and links for the Quadra 650