Macintosh Quadra 950

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Macintosh Quadra 950
Quadra 950 hero.jpg
Release date March 18, 1992
Introductory price $7,200
Discontinued October 14, 1995
Operating system 7.0.1-7.5.1, later 7.5.3-8.1, or with PowerPC upgrade, OS 9.1; A/UX
CPU Motorola 68040 @ 33 MHz
Memory MB,[1] expandable to 256 MB[1] (80 ns 30-pin SIMM)

The Macintosh Quadra 950 is the third desktop computer in Apple Computer's Quadra line. Like its predecessors, it was based on Motorola's 68040 microprocessor. It replaced the Quadra 900, increasing the CPU clock rate from 25 MHz to 33 MHz, and improving the graphics support. The two computers were otherwise identical.

In 1993, the 950 was overtaken in performance by the less expensive Quadra 800 and 840AV. The newer Quadras had the addition of interleaved RAM, as well as an enhanced video system and SCSI bus. However, their more compact (minitower) case proved difficult to work with, and the 950 (due to its full tower case allowing 6 slots (5 NuBus and one PDS) to be supported) was kept in continued production for the server market, outliving the 800 and 840AV.

The Quadra 950 was discontinued in 1995, being replaced by the more powerful Power Macintosh line of PowerPC computers. It was one of the last 68k models to be discontinued, due to its high RAM capacity and large number of NuBus slots. Apple wouldn't make another 6-slot Mac until the Power Macintosh 9600 in 1997.

This computer used a key to limit access to various subsystems depending on the computer's use environment. The key switch had three positions labelled OFF, ON and SECURE. The OFF position immediately cut the power and prevented the computer from being powered on. The ON position allowed the computer to operate normally. The SECURE position was intended for use as a server–power was always applied in this position. If the computer lost power, it would immediately start up when power was restored. Also, this position disabled the keyboard, mouse and floppy disk drive.[2]


  • Processor: Motorola 68040
  • Processor Speed: 33 MHz
  • Processor Cache: 8 KiB L1
  • Processor Bus Speed: 33 MHz
  • Hard Drive: 230 MB - 1 GB
  • Media drives: 2x CD-ROM drive, 1.44 MB floppy drive, optional DDSDC drive
  • Software: Mac OS 7.1 - 8.1
  • Logicboard RAM: None
  • Maximum RAM: 256 MB
  • Type of RAM Slots 16 - 30 pin SIMM
  • Minimum RAM Speed: 80 ns
  • Interleaving Support: No
  • Display Connection: DB-15
  • Graphics Card: None
  • Graphics memory: 1 - 2 MB (four sockets)
  • Expansion Slots: 5 - NuBus, 1 - PDS
  • Hard Drive Bus: SCSI
  • Backup Battery: 3.6 V Lithium
  • Max Watts: 303 W
  • Ports: AAUI-15 Ethernet, DB-25, 2 Serial, 3.5-mm mono input jack, 3.5-mm stereo output jack

See also[edit]


  1. ^ a b Physical memory is specified using binary meanings for K (10241 instead of 10001), M (10243 instead of 10001), G (10243 instead of 10001), ...
  2. ^ "Quadra 900, 950, AWS 95, WS 9150: Security Keyswitch". 

External links[edit]

Preceded by
Macintosh Quadra 900
Macintosh Quadra 950
March 18, 1992
Succeeded by
Power Macintosh 9500