An I/O controller is a hardware component that facilitates the interactions between a computer’s processing unit and peripheral devices such as keyboards, storage drives, printers, mice, etc.

It ensures precise and effective transmission of data and commands between the CPU and external devices.

Examples of I/O Controllers

I/O Controller Difference

I/O controllers differ in connection types, speed, and supported data. For instance, USB controllers transfer data faster than parallel and serial controllers. The compatibility of I/O controllers with computer devices also varies; specific devices may require a particular type of I/O controller.

Tips for Optimizing I/O Controller Performance