Macintosh IIfx (1990)

Macintosh IIfx (1990): the fastest model in the Macintosh II series: 68030 at 40 MHz, level-2 cache, six NuBus slots and 64-pin SIMMs unique to this model.

Specs

Launch

Apple introduced it on March 19, 1990 and it was sold until April 15, 1992. It was the fastest model in the Macintosh II series, partly thanks to then-very-fast RAM in a SIMM format unique to the IIfx, its level-2 cache, and hardware that let applications be optimized for speed. Dates and data: EveryMac; the introduction is also recorded in Apple Support and Apple’s Tech Info Library.

Marketing

The professional top of the line: 68030 at 40 MHz, L2 cache and six NuBus slots, with no built-in video. Its 64-pin SIMMs were not compatible with other Macs, though parity memory was supported. With launch prices of $8,970 to $10,970 in the US depending on configuration, it was the most expensive Mac of its time. (EveryMac.)

Flaws and fixes

Apple documents no model-specific defects in the sources consulted. Limits that do appear in its spec sheet: RAM of 4 MB to 128 MB using 8 64-pin SIMM slots (80 ns), a format used only by this model; 24- or 32-bit addressing; no built-in video.

More from the same family

Updated: October 29, 2026 · Sources: Apple Soporte · Apple Tech Info Library · EveryMac · Compare this product