Quadra 950

Apple replaced the Quadra 900 with the 950, boosting CPU speed from 25 MHz to 33 MHz. Because Apple removed some “wait states” from the video section, the 950’s internal video is about 20% faster than the 900’s – and the faster CPU helps things along even more. The 950 can display 16-bit video on a 19″ monitor without the need for a third-party video card.

Quadra 950

The Quadra 950 is built like a tank and obviously designed to sit on the floor. With 16 SIMM slots, you can add incredible amounts of memory, along with plenty of huge hard drives. This is obviously designed to be used as a server.

Quadra 950

According to Apple, the monstrous power supply can support two 25-watt NuBus cards and three of the more typical 15-watt cards.

The internal SCSI bus is terminated on the motherboard, so internal SCSI devices should not be terminated. This is the opposite of all other Macs except the Quadra 900. However, the external SCSI bus works the same as on other Macs.

Although there are two separate SCSI buses, System 7.0-7.1 “folds” them together so the operating system sees a single virtual SCSI bus. Thus, under System 7.0-7.1 (and only under those systems) you must make sure that all devices on both chains have unique IDs.

The Apple Workgroup Server was a special version of the Quadra 950 designed to run A/UX, Apple’s version of Unix. The only difference between the Quadra 950 and the AWS 95 is the presence of the Apple Workgroup Server PDS Card in the AWS 95. To use the AWS 95 as a standard Mac, you must remove that card.

See our NuBus Video Card Guide for information on adding a video card.


  • introduced 1992.05.18 at $8,500; discontinued 1995.10.14
  • requires System 7.0.1 or later; highest version supported without a PPC upgrade is Mac OS 8.1.
  • CPU: 33 MHz 68040
  • Performance: 14.7, relative to SE; 10.14, MacBench 2.0 CPU; 21.9, Speedometer 3; 1.19, Speedometer 4; 29 MIPS (see Benchmarks: Quadra 950 for more test results)
  • 5569 Whetstones
  • ROM: 1 MB
  • RAM: 4 MB, expandable to 256 MB using 80ns 30-pin SIMMs; motherboard had 4 banks of 4 SIMM slots; can use 1 MB, 4 MB, 8 MB, and 16 MB SIMMs (8 MB and 16 MB SIMMs are not supported by Apple)
  • video: 1 MB VRAM, expandable to 2 MB; internal video does not support 16-bit mode
    • 512 x 384: 24-bit
    • 640 x 480, 832 x 624: 8-bit @ 1 MB, 24-bit @ 2 MB
    • 1152 x 870: 8-bit
  • L2 cache: optional, PDS
  • ADB: 2 ports for keyboard and mouse
  • serial: 2 DIN-8 RS-422 ports on back of computer
  • SCSI: separate internal and external busses, DB-25 connector on back of computer, max. 4.4 MBps read
  • Hard drive: 230 MB, 500 MB, or 1 GB
  • CD-ROM: 2x
  • NuBus: 5 NuBus 90 slots
  • one PDS slot
  • size (HxWxD): 18.6″ x 8.9″ x 20.6″
  • Weight: 36.8 lbs.
  • PRAM battery: 3.6V half-AA
  • Gestalt ID: 26
  • addressing: 32-bit
  • upgrade path: Power Mac PDS card; Power Mac 9500

Accelerators & Upgrades

Online Resources


  • Outside of California, Apple discontinued support and parts orders for this model on 2001.01.01. You may be able to find dealers with parts inventory either locally or on our parts and service list.
  • In 24-bit video mode, the Quadra 700 and 900 actually use 32-bits per pixel. While most Macs can display 24-bit video at 640 x 480 with 1 MB of VRAM, you must have 2 MB VRAM for 24-bit on these models (see Apple Knowledge Base Archive #10992 for more details).
  • You must have a “fat” system installed to use a PowerPC upgrade as well as the 68040 CPU.

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