40 and 56 MB configurations are possible only when a Newer Technology NUpowr with 8 MB onboard, part # 7NU167-8M, or a NUpowr with 24 MB onboard, part # 7NU183-24M are installed.
Apple sometimes advertises this as a 66 MHz machine, since the clock speed is doubled inside the processor chip. However, all I/O to the processor is done at 33 MHz.
9.5” color active matrix LCD - 16 bit (thousands colors) Display.
One of the configurations sold by Apple contains 12MB of memory. This configuration requires the removal of the factory-installed 8MB memory module in order to upgrade to a larger capacity memory module.
Serial Port with the phone icon supports synchronous modems, with handshaking on both the output and input.