What Is N-Key Rollover? Full Detailed Guide

  • Post published:January 16, 2023
  • Post category:Keyboard
  • Post author:
  • Reading time:18 mins read

In this blog post, we will take a look at What Is N-Key Rollover? And Also explore the technology behind N-key Roller and how it can improve your typing and gaming experience.

There are different types of rollover capabilities, each indicating the number of keys that can be registered at the same time. Whether you need N-Key Rollover or not depends on how you use your keyboard and how important responsiveness and precision are to you.

Quick Answer:
N-Key Rollover (NKRO) is a technology that allows a keyboard to register multiple keys pressed simultaneously without any keys getting “stuck” or not registering.

This is especially important for gamers and power users who need to press multiple keys at once in order to execute complex in-game maneuvers or perform multiple tasks at once.

Let’s Start and Get further detail about N-key Roller.


What does N-key rollover mean?

N-Key Rollover (NKRO) refers to the ability of a keyboard to register multiple key presses simultaneously without any keys getting “stuck” or not registering.

This means that when multiple keys are pressed at the same time, each key press will register correctly, regardless of how many other keys are being pressed at the same time.

This technology is particularly useful for gamers and power users who need to press multiple keys at once in order to execute complex in-game maneuvers or perform multiple tasks at once.

What Is N-Key Rollover full detailed guide

What is N-key rollover good for?

N-Key Rollover is a feature that can be helpful for people who need to press multiple keys at the same time, especially in gaming and productivity scenarios. Here we will see several scenarios, including:

Gaming:

In games, NKRO allows players to press multiple keys at once to execute complex maneuvers or perform multiple actions simultaneously without any keys getting “stuck” or not registering.

Productivity:

For power users, NKRO allows multiple keystrokes to be registered at the same time, which can improve efficiency and speed when performing tasks such as data entry or coding.

Music production:

Musicians and audio engineers can use NKRO keyboards to play multiple notes or trigger different sound effects simultaneously.

Graphic and video editing:

Designers and video editors can use NKRO to trigger multiple hotkeys to speed up the design and editing process.


What Happens If You Exceed Keyboard Rollover?

If you exceed the rollover limit of a keyboard, some of the key presses may not register properly. This can lead to a number of issues such as keys getting “stuck” or not registering at all, or certain key presses being misinterpreted as different key presses.

This can cause confusion and frustration, especially in gaming or productivity scenarios where precision is key.

For example, in a game, if you press multiple keys at once to execute a complex move and some of them don’t register, it can cause your character to move or act in unexpected ways, putting you at a disadvantage.

In productivity scenarios, if you press multiple keys at once to trigger different hotkeys and some of them don’t register, it can slow down your workflow and make you less efficient.

So, it’s important to have a keyboard with enough rollover to match your needs, especially if you need to press multiple keys at once frequently.


Do You Need N-key Rollover?

If you are a casual user who primarily uses a keyboard for typing, browsing the internet, and basic computer tasks, N-key Roller may not be necessary for you. Basic keyboards with 2-Key or 6-Key rollover would be sufficient.

However, if you are a gamer or power user who frequently needs to press multiple keys at once to execute complex in-game maneuvers or perform multiple tasks at once, then N-key Roller can greatly improve your experience.

This is particularly true for fast-paced games where precision and responsiveness are crucial.

In addition, if you are a musician, audio engineer, graphic designer, or video editor who needs to press multiple keys at once to play different notes or trigger different sound effects/hotkeys, N-key Roller can also be beneficial.

Keep in mind that, whether you need N-Key Rollover or not depends on how you use your keyboard and how important responsiveness and precision are to you.

Don’t forget to Read: difference Between Membrane and Mechanical keyboards


How do I know if my keyboard has an N-key rollover?

There are a few ways to determine if your keyboard has N-Key Rollover (NKRO):

Check the product specifications:

Most manufacturers will list the rollover capability of their keyboards in the product specifications. Look for terms like “N-Key Rollover” or “NKRO” to confirm that the keyboard has this feature.

Test it with software:

Some software such as Microsoft’s Keyboard Detection Tool or the free software called “Aqua Key Test” can be used to test the rollover capability of your keyboard. These tools allow you to press multiple keys at once and will indicate which keys are being registered.

Check the keycap:

Some high-end keyboards or gaming keyboard has a N-key roller label or logo on the keycap.

Keep in mind that not all manufacturers provide information about rollover in the product specifications, so you may need to test your keyboard using software or trying to press multiple keys at the same time to see if all of them register.

Also, some USB keyboards support NKRO over USB, but not PS/2, so you should check the connection type of your keyboard and the rollover capability of it in that connection type.


Do all keyboards have N-key rollover?

No, not all keyboards have N-Key Rollover (NKRO) capability. Many basic keyboards only have 2-Key or 6-Key rollover, which means they can only register two or six keys pressed at the same time, respectively.

This is sufficient for basic typing and computer tasks, but can be limiting for gaming or productivity scenarios where multiple key presses are required.

NKRO capability is more commonly found in high-end gaming keyboards, or in mechanical keyboards. Mechanical keyboards tend to have more durable switches that can handle multiple key presses and hence, tend to have better rollover capabilities.

However, even among gaming or mechanical keyboard, not all of them have NKRO capability, so it’s important to check the product specifications or test the keyboard to confirm its rollover capability.

Also, some USB keyboards support NKRO over USB, but not PS/2, so you should check the connection type of your keyboard and the rollover capability of it in that connection type.


What are The Common Types of N-Key Rollover?

There are several common types of N-Key Rollover (NKRO) that can be found in keyboards: Here we are taking about most common key rollers.

1. Full N-Key Rollover (FNKRO):

This is the most advanced type of NKRO, and it allows for an unlimited number of keys to be pressed simultaneously and registered correctly. This means that every key press, no matter how many other keys are being pressed at the same time, will be registered correctly.

2. N-Key Rollover (NKRO):

This type of NKRO allows for a high number of keys to be pressed simultaneously and registered correctly, usually around 12-24 keys. It is sufficient for most gaming and productivity scenarios.

3. 2-Key Rollover (2KRO):

This type of rollover only allows for 2 keys to be pressed simultaneously and registered correctly. This is the most basic type of rollover and is typically found in basic keyboards that are not intended for gaming or heavy productivity use.

4. 6-Key Rollover (6KRO):

This type of rollover allows for up to 6 keys to be pressed simultaneously and registered correctly. It is suitable for basic typing and computer tasks, but may be limiting for gaming or productivity scenarios that require multiple key presses.

5. 10-Key Rollover (10KRO):

A 10KRO keyboard can register a maximum of ten key presses at the same time. This means that if more than ten keys are pressed simultaneously, some of them may not register properly. This type of rollover is typically found in mid-range gaming keyboards.

6. 14-Key Rollover (14KRO):

A 14KRO keyboard can register a maximum of 14 key presses at the same time. This means that if more than 14 keys are pressed simultaneously, some of them may not register properly. This type of rollover is typically found in some high-end gaming keyboards.

It’s important to note that some manufacturers may use different terminology to refer to these types of rollovers, so it’s important to check the product specifications or test the keyboard to confirm its rollover capability.


How to Test N-key rollover of Keyboard?

To Check N-key roller, You can press three keys, Then 5 Keys simultaneously. If all the keys are working and typing properly then keyboard has N-key roller.

You can use Key roller Test from this Link too: Key Rollover Test Online

What is the Usage of the Key Rollover Test?

A key rollover test is used to check the rollover capability of a keyboard, meaning the number of keys that can be registered at the same time.

This test can help you determine if your keyboard is suitable for your needs, especially if you frequently need to press multiple keys at once for gaming or productivity tasks.


Is N-Key Rollover the Same as Anti-Ghosting?

N-Key Rollover (NKRO) and Anti-Ghosting are similar concepts, but they are not exactly the same thing.

N-Key Rollover refers to the ability of a keyboard to register multiple key presses simultaneously without any keys getting “stuck” or not registering. It means that all key presses will register properly, regardless of how many keys are being pressed at the same time.

Anti-Ghosting, on the other hand, refers to the ability of a keyboard to prevent “ghosting” which is when a keyboard registers a key press that was not intended. Ghosting occurs when the keyboard’s matrix (the circuit board that detects key presses) can’t handle multiple key presses at the same time, and it registers a key press that was not made by the user.

Don’t forget that, N-Key Rollover refers to the number of keys that can be registered at the same time, while Anti-Ghosting refers to the ability of the keyboard to prevent unintended key presses.

Some keyboards may have both features, some may have only one or none.

Keep in mind that not all manufacturers use the same terminology and not all keyboards are built the same way, so you may need to check the product specifications or test the keyboard to confirm its rollover and anti-ghosting capability.


Conclusion:

In conclusion, N-Key Rollover (NKRO) is a technology that allows a keyboard to register multiple keys pressed simultaneously without any keys getting “stuck” or not registering.

This is especially important for gamers and power users who need to press multiple keys at once in order to execute complex in-game maneuvers or perform multiple tasks at once.

It’s also important to note that N-Key Rollover and Anti-Ghosting are similar concepts but not the same thing. It’s important to evaluate the features that are important for your needs and match them with the keyboard you choose.

FAQs:

What is N-Key Rollover in keyboards?

N-Key Rollover (NKRO) refers to the ability of a keyboard to register multiple key presses simultaneously without any keys getting “stuck” or not registering.

This means that when multiple keys are pressed at the same time, each key press will register correctly, regardless of how many other keys are being pressed at the same time.

How do I know if my keyboard has N-Key Rollover?

You can check N-key roller of a keyboard by pressing Multiple keys at the same time. if all the keys are registering then keyboard has N-key roller.

You can check the product specifications, test it with software, or look for a label or logo on the keycap of your keyboard. Some high-end gaming or mechanical keyboard tend to have this feature.

How does N-key rollover work?

N-key rollover works by using a matrix of switches in the keyboard, where each key corresponds to a unique combination of rows and columns.

When a key is pressed, it completes the circuit between the corresponding row and column, which sends a signal to the computer to register the key press.

How many keys can be pressed simultaneously on an N-key rollover keyboard?

The number of keys that can be pressed simultaneously on an N-key rollover keyboard can vary depending on the specific keyboard.

Some keyboards may only support 6-key rollover, while others may support up to full N-key rollover, which allows for an unlimited number of simultaneous key presses.

Raisaleem

I am Rai Saleem (MSc. Computer Science). Worked with Different Tech StartUps. I have 4+ Years of Working Experience in the Computer Industry. On This platform, I share My Experience and Providing Solutions for Computer problems.

I Started This Journey From 2G internet with 30KB downloading Speed to This modern 5G World. Now Sharing My IT Experience With loving People Like You. I am addicted to This Drug of Computer Science since My Childhood When I Got my first core 2 duo Pc.