description Apple Macintosh Quadra 900 Overview
The Apple Macintosh Quadra 900 is a 1990s tower computer notable for its powerful 68040 processor and NuBus expansion system. Designed for professional users requiring high performance computing, it was primarily utilized by graphic designers, engineers, and other demanding creative professionals seeking robust desktop capabilities before the widespread adoption of faster processors.
help Apple Macintosh Quadra 900 FAQ
What processor does the Macintosh Quadra 900 use?
Apple equipped the Quadra 900 with a 25 MHz Motorola 68040 containing integrated floating-point and memory-management units. It was introduced alongside the Quadra 700 in 1991 as part of Apple's first Quadra generation.
How much RAM can a Quadra 900 support?
Apple lists 16 SIMM slots and a supported range from 4 MB to 256 MB of RAM. Memory is installed with 30-pin SIMMs in groups of four.
Why was the Quadra 900 unusually expandable?
Its large tower contains five NuBus slots plus a processor-direct slot, along with internal SCSI storage capacity. That made it useful as a high-end workstation or departmental server rather than an ordinary home Macintosh.
What replaced the Macintosh Quadra 900?
Apple discontinued the Quadra 900 in 1992 and replaced it with the faster Quadra 950. The 950 retained the large expandable tower concept but increased the Motorola 68040 clock speed.
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