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Apple Macintosh IIfx Specs

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Apple Macintosh IIxThe Apple Macintosh IIfx features a 40 MHz 68030 processor, a 68882 FPU, 4 MB of RAM, a 1.44 MB floppy drive or a 1.44 MB floppy drive and a 80 MB or 160 MB hard drive, and the option of an Apple Macintosh II video card in an easy-to-expand desktop case.

The Macintosh IIfx is the fastest model in the Macintosh II series partly due to then-superfast RAM that was unique to the IIfx, a level 2 cache, and advanced hardware that allowed some applications to be optimized explicitly for speed.

To purchase or upgrade a vintage Mac -- and newer Macs -- see site sponsor OHS.

  • Tech Specs
  • Ports

Click on the category for related details. The most commonly needed info is "open" by default, but all info is important.

March 19, 1990 April 15, 1992
Details: The "Introduction Date" refers to the date a model was introduced via press release. The "Discontinued Date" refers to the date a model either was replaced by a subsequent system or production otherwise ended.

Also see: All Macs introduced in 1990.
40 MHz 68030
Details: This model has a 32-bit processor and a 32-bit data path.
N/A 68882
Details: N/A
40 MHz N/A
Details: N/A
Macintosh ROM 512k
0.5k 32k
Details: N/A
64-pin SIMM* 80 ns
Details: *Note that the Macintosh IIfx uses unique 80 ns 64-pin SIMMs that are not compatible with other Macs. Parity memory also is supported.
4 MB 128 MB
Details: 128 MB requires eight 16 MB SIMMs.

Also see: Actual Max RAM of All G3 & Later Macs.
None 8*
Details: *RAM SIMMs must be installed in groups of four.
Video Card* Video Card*
Details: *Various video cards were available with varying capabilities.
Varied* Varied*
Details: *VRAM varies depending on video card installed.
Up to 6 Displays* 512x384, 640x480*
Details: *The Macintosh IIfx can support multiple displays -- originally at great cost -- using multiple video cards in NuBus expansion slots. The Macintosh IIfx also can support multiple resolutions, 512x384 and 640x480 are common. Portrait (vertical orientation) displays also were popular.
Dual/Mirroring* Variable*
Details: *This model can support multiple displays with multiple video cards.
80 MB, 160 MB* SCSI
Details: *The Macintosh IIfx was offered with an 80 MB or an 160 MB internal SCSI hard drive, as well as with only a 1.44 MB disk drive.
None 1.44 MB (Auto)
Details: By default, one 1.44 MB floppy disk was installed, but the system supports two and dual 1.44 MB floppy drives were a common configuration as well.
None None
Details: N/A
6 NuBus, IIfx PDS None*
Details: *There are no free expansion bays with dual disk drives and one hard drive installed. With one 1.44 MB floppy drive installed, a second bay is available for a second disk floppy drive. Third-party products were available to install additional and other storage options as well.
Desktop Macintosh II
Details: N/A
M5510LL/A* Macintosh IIfx
Details: *M5510LL/A refers to the Macintosh IIfx configured only with a single 1.44 MB disk drive. With an 80 MB or 160 MB hard drive, the Macintosh IIfx was assigned order numbers M5515LL/A and M5520LL/A, respectively. With A/UX pre-installed, the order number is M5523LL/A and with parity RAM pre-installed, the order number is M5524LL/A. All of these configurations shipped with 4 MB of RAM.
M5525 13
Details: N/A

Also see: All Macs with the M5525 Model Number and 13 Gestalt ID.

For more about identifiers and how to locate them on modern Macs, please refer to's Mac Identification section.
3.6V Lithium (x2) N/A
Details: N/A
6.0.5 6.0.5-7.5.1, 7.5.3-7.6.1
Details: Earlier and later versions of the Macintosh System/Finder and Mac OS are not supported.

For systems capable of running older versions of the Mac OS -- as well as modern ones -- please see site sponsor OHS. OHS specializes in heavily upgraded Macs capable of running both Mac OS X and Mac OS 9 applications.
5.5 x 18.7 x 14.4 24.0 lbs (10.9 kg)
Details: In inches - height by width by depth, (14 cm, 47.5 cm, 36.6 cm).
US$8970-US$10,970 N/A*
Details: *As a collector's item, this model may still retain value.

Photo Credit: MacUser Magazine (Radius Advertisement).

Click on a category for additional details. The most commonly needed info is "open" by default, but all info is important. The icons correspond with the icons for each port on the computer.

1* None
Details: *Video port provided by required video card. No onboard video port.
2 1 (DB-25)
Details: N/A
2 None
Details: Serial ports are marked by printer and modem icons.
None None
Details: N/A
None None
Details: N/A
None None
Details: N/A
1 (8-Bit Mono) None
Details: N/A
1 None
Details: N/A
1 N/A
Details: 100V-240V AC, 48-62 Hz Frequency, 230 Max Watts.

Icon Credit: Apple Computer, Inc.

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