expansion card

noun

, Computers.

1. a card in a computer on which additional chips can be mounted to expand the computer's capabilities.

Example Sentences

The Framework makes it especially easy to change the set of ports on the laptop, using a series of modular USB-C expansion cards to let you quickly swap connectors whenever you want.

From Popular-Science

You can buy a proprietary storage expansion card for the Xbox’s expansion slot, but an extra TB will run you over $200, making you wonder if dropping the extra $100 for a Series X in the first place will pay for itself in terms of storage.

From Time