Why can the keyboard only digest 6 keypresses at a time


When I slam my hand onto my keyboard, only a maximum of 6 keys will be registered, I've tested this for the past few minutes and was unable to get more than 6. Is this the same on all keyboards? If not, what would be the distinguishing factor, If yes: why 6 specifically?

For clarification: I do not have a usecase for this, I am simply curious

Best Answer

Not all keyboards are like that. What you're referring to is called rollover or key rollover. This simply refers to a computer's ability to correctly handle several simultaneous keystrokes.

X-key rollover refers to how many keys you can press down at once, while still being registered by the computer.

I don't know if there is a standard "default" level, but many keyboards are 6-key rollover. There are some gaming and higher end keyboards that have true n-key rollover, which means each key is scanned completely independently by the keyboard hardware. This ensures that each keypress is correctly detected regardless of how many other keys are pressed down at the same time.

Depending on your keyboard, you could have the option to use 6-key rollover, or enable true n-key rollover. For example, I have a Deck Hassium Pro that has 6-key rollover by default, but there is a hotkey to enable true n-key rollover.