The was introduced by
Apple in 1988 as an incremental update of the original
Macintosh II model. It replaced the
Motorola 68020 CPU and
68881 FPU of the II with a 16 MHz
68030 CPU and
68882 FPU (running at the same clock speed); and the 800 KB
Floppy Drive with the 1.44 MB
SuperDrive . The initial price of the IIx was US$7,769 or $9,300 for a version with the 40 MB hard disk drive. The Mac IIx, like the Mac II, sported 0.25 KB of L1
Cache , a 16 MHz bus (1:1 with CPU speed), and supported up to System 7.5.5.
The IIx was the second of three Macintosh models to built in this case with the 6
NuBus slots; the last was the
Macintosh IIfx .
Apple's
Codename s for the IIx included "Spock" and "Stratos". Support and spare parts for the IIx were discontinued on
August 31 1998 .
