The display (160 x 100 pixels) is bigger and allows the user to see the plots much better.
Its CPU processes much more data at a faster speed. The TI-89 is major upgrade over the TI-83 Plus. The TI-84 Plus CE only has a mini-USB port (in contrast, the TI-83 only has an I/O port). This feature allows the user to see a graphing request in better detail. The color display on this TI-84 is much bigger (320 x 240 pixels). Its CPU is three times faster than the TI-83 Plus CPU.
The TI-84 uses a rechargeable battery (designed to last around two weeks on single charge) instead of AAA batteries. The TI-84 Plus CE has slimmer body than the TI-83 Plus. Both calculators have an I/O port but the TI-84 Plus also includes a mini-USB port. The devices also are powered by four (4) AAA batteries. The processor on the TI-84 has a faster clock (operates at 15 MHz instead of 6 MHz (TI-83 Plus)), therefore it should process requests a little faster. Both calculators use the same type of central processing unit (CPU) (Zilog Z80), and the displays are the same (96 x 64 pixels). In fact, the only difference is that the TI-84 has a mini-USB port while the TI-83 does not. Physically, the TI-83 Plus and the TI-84 Plus are similar.
