The Macintosh IIfx is the fastest of the II line and shipped with a 40MHz Motorola 68030 processor.
The IIfx uses unique memory which uses 64 pins. We're not aware of compatible RAM being used in any other system.
- Set the system date to 3/19/90 (the release date of the IIfx), and restart while holding down Command-Option-f-x. You'll see a color picture of the IIfx design team. Click the mouse to continue.