The PowerBook 3400c series was issued in three different models, distinguished primarily by their processor speed. The base model ran at 180 MHz, and the two higher end models ran at 200 MHz and 240 MHz. Thus, the different models were referred to as the 3400c/180, 3400c/200, and 3400c/240. The 3400c/180 model was usually sold with only a built-in modem and a floppy drive; all 3400c/200 and 3400c/240 machines came with a built-in modem/Ethernet combination port and hot-swappable 1.4 MB floppy disk and CD drives. The only other difference between them was the size of the hard drive, ranging from 1.3 to 3.0 GB depending on the model.