Macintosh Quadra 900

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Macintosh Quadra 900

Manufacturer	Apple Computer
Introduced	October 21, 1991
Discontinued	May 18, 1992
Price	US$8500
CPU	Motorola 68040, 25 MHz
RAM	4 MB, expandable to 256 MiB, 80 ns 30-pin SIMM
OS	System 7.0.1

The Macintosh Quadra 900 was a high-end personal computer introduced with the Quadra 700 in October 1991 as Apple Computer's first computers in the Quadra series using the Motorola 68040 processor. It was discontinued in 1992, and succeeded by the very similar Quadra 950. The Quadra 900 could be upgraded to 256 megabytes of RAM, which with its 25 MHz processor made it a very useful computer for scientific or design work. Quadra 900 and 950s will full complements of RAM were exceedingly rare, due to the high cost (many thousands of dollars) of the SIMMs at the time.

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