When choosing a keyboard, the question of connection type often arises: PS/2 or USB. Both options have their own features that can affect ease of use. In this article, we will compare PS/2 and USB keyboards by key characteristics: connection type, transfer speed, compatibility, and price.

Connection type is the main difference. PS/2 uses an outdated round connector, which is mainly found on older motherboards. USB is a modern standard present on all computers and laptops. USB provides easier connection and support for hot swapping, while PS/2 requires a reboot for recognition.

Data transfer speed of USB is higher, especially in USB 2.0 and above. However, for text input, this difference is insignificant. PS/2 has low speed, but it is quite sufficient for a keyboard. In games where polling rate is important, USB with high frequency (1000 Hz) may be preferable.

Compatibility is an important factor. USB keyboards are universal and work with most devices, including laptops without a PS/2 port. PS/2 keyboards are limited to desktop computers with the corresponding port. For modern users, USB is more practical, although PS/2 is still used in some professional environments due to the possibility of N-Key Rollover (simultaneous pressing of many keys).

Price of keyboards with PS/2 and USB interfaces is almost the same. However, models with PS/2 may be cheaper due to simpler construction. On the other hand, USB keyboards have a wider range and are available in different price categories.

Ultimately, the choice between PS/2 and USB depends on your needs. If you need versatility and simplicity, choose USB. If you use an old computer or need maximum reliability when working with outdated equipment, PS/2 may be an option. In any case, both types of keyboards perform their main function — text input — equally well.