What is Input Lag: The Breakdown

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When playing video games (or even using the computer), input lag can be a hindrance and can affect how these tasks are performed. This phenomenon started to get a lot of press when the Xbox 360 and Playstation 3 came out in 2005/2006, due to these systems pushing the HDTV adoption rate in the common home. Consumers were happy with the increase in picture quality and resolution they were receiving from these televisions, but it came at a price known as input lag. Still to this day, a lot of people don’t realize its there and how it can affect your enjoyment in these applications.

What is input lag?

Quite simply, its the delay between a button press on your controller and what results on the display. The amount of delay varies between different displays (and is one of the reasons this website was founded, to fight this ignorance), and it can be very hard to detect without lots of experience. Its also something that wasn’t easy to measure, due to the complications of old methods. Thankfully, we have a new method that simplifies this process.

How does it affect me?

Ever played Call of Duty, Halo, or maybe Street Fighter online? If you have, you probably know what a laggy connection feels like. But that’s not all that’s in play here. This feeling is amplified because of your display as well! Games like Call of Duty and Halo use netcode that hides input lag so your inputs stay responsive, but if there is lag, it affects what happens on the screen (other players jerking around, teleporting, frames dropping, etc), whereas a game like Street Fighter 4 causes input lag if the connection is laggy (this game has to keep frames v-synced due to the nature of the game).

Imagine if Call of Duty or Halo had input lag on top of the de-syncing that occurs due to laggy connections. Not only are you having trouble keeping up with the action warping around the screen, but your controller is not responding as accurately as it should. Street Fighter 4 can nearly double or triple its input lag because of a bad display. A fighting game needs to have instant response times to react and execute combos. Now imagine variable input lag from a bad internet connection, and fixed input lag from a bad gaming display. Sounds horrible right? That combo that you would normally execute on an excellent display (ASUS MX279H) is now twice as hard to do on a bad display. That’s before we even set foot online with its variable connection tendencies.


Can I do anything to stop input lag?

If you already have a poor gaming display, there are some steps you can take to reduce input lag. I wrote a short guide on how to enable “Game Mode” on some of the major television brands. However, this doesn’t always produce the results you want. If you’re stuck in this situation, you will have to buy a new display that suits your needs. The biggest problem when choosing a display is how much you’re willing to compromise. It took me years to compromise with the fact that I will not find one display that satisfies all of my needs. The best gaming displays are usually lower end monitors that aren’t designed for picture quality in mind, but they have the best input response and are ideal for playing games.

If you want something nicer like a big HDTV, you are sacrificing some responsiveness for more features and a big screen. Thankfully, you aren’t sacrificing much when it comes to some HDTVs. Please refer to DisplayLag’s grading scale, and check out the database for HDTVs with a GREAT rating. These HDTVs will suit almost all of your gaming needs, unless you plan to compete in video game tournaments. Excellent displays are suited for that application. I currently use an ASUS monitor for competitive gaming, and a Samsung HDTV for my regular watching and casual games.

What causes input lag?

There are a variety of factors, but these are the most common ones:

  • Source resolution being different from the native display resolution
  • Expensive image processing (motion interpolation)
  • Using the display’s scaler to convert interlaced images to progressive

Try to adjust these settings on your display and see if it helps with the responsiveness!

Hopefully upon reading this article, you gained a little more insight on how a display can affect your gaming performance. Feel free to comment below if you have any questions or concerns. Remember, don’t forget to check out the input lag database to see over 200 screens tested for input lag!

About the author

Adeel Soomro

Adeel Soomro, also known as "Four Wude", has been professionally competing in fighting games since 2008. Using his extensive gaming experience on a casual and professional level, he aims to spread the awareness of input lag existing in today's displays. Having tested over 500 displays for input lag, he hopes that DisplayLag will aid gamers around the world when purchasing the best HDTV or monitor for gaming.