Apple Macintosh Centris 650 vs Apple Macintosh Quadra 605

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Macintosh Centris 650 compared with Macintosh Quadra 605

	AppleMacintosh Centris 650	AppleMacintosh Quadra 605
Overview
Released
Released	1993	1993
Performance
Processor
Processor	Motorola 68040 25 MHz (Macintosh Centris 650) or Motorola 68LC040 25 MHz (Macintosh Centris 650)	68LC040 25 MHz (Macintosh Quadra 605)
CPU cores
CPU cores	1	1
Memory
Memory	4 MB	4 MB
Storage
Storage	–	80 MB to 160 MB
CPU
CPU	25 MHz Motorola 68040 or 68LC040; the latter has no floating-point unit	25 MHz Motorola 68LC040 with integrated memory management, 8 KB L1 cache and no floating-point unit
GPU
GPU	Built-in video with 512 KB VRAM, expandable to 1 MB; supports an external monitor through a 15-pin video connector	Built-in video with 512 KB VRAM supports 8-bit colour at 640 × 480 and 832 × 624; 1 MB VRAM raises both to 16-bit colour
Memory type
Memory type	4 or 8 MB minimum RAM depending on configuration, with four SIMM slots; up to 136 MB	4 MB on the logic board and one 72-pin SIMM slot; Apple supports 4–36 MB total
Storage type
Storage type	Apple's system fact sheet lists 80–500 MB internal SCSI hard drives and a 1.44 MB floppy drive; an internal CD-ROM drive was optional	Internal 1.44 MB floppy drive and 80 or 160 MB internal SCSI hard drive
Expansion slots
Expansion slots	Three NuBus slots and one processor-direct slot; a PDS card occupies the position of one NuBus card	One LC III-compatible expansion slot; the 68LC040 cannot use a separate FPU card
Display
Screen
Screen	None built in	None built in
Design and power
Type
Type	Compact	Compact
Weight
Weight	–	3.99 kg
Width × depth × height
Width × depth × height	330 × 419 × 152 mm	310 × 389 × 74 mm
Operating system
Operating system	macOS	macOS
Size and weight detail
Size and weight detail	–	Apple's 2.9 × 12.2 × 15.3 inch and 8.8 lb reference dimensions; metric fields are rounded conversions
Power supply
Power supply	–	Maximum 30 W; 100–240 V AC, 47–63 Hz; 3.6 V lithium clock battery
In the box
In the box	Apple's original developer note documents the 68040 and 68LC040 configurations. Current Apple support article 112207 describes a later PowerPC upgrade-card configuration and is excluded.	Original System Software 7.1 with System Enabler 065. Apple lists 21 October 1993 as introduction; a separate first-sale month was not established.
Connections
Back ports
Back ports	Two Apple Desktop Bus ports, two serial ports, external SCSI, video, audio input and output; Apple AUI Ethernet was optional	Apple Desktop Bus, DB-15 video, DB-25 SCSI, printer and modem serial ports, sound input and output; no built-in Ethernet
External displays
External displays	–	Built-in video supports up to 1152 × 870 pixels; colour depth depends on VRAM
Speakers
Speakers	Built-in mono speaker with stereo audio output jack	Internal speaker