What is DyAc?

ProSettingsLibrary44 Comments

What is DyAc


DyAc (Dynamic Accuracy) is a proprietary BenQ Zowie technology which is used on their (higher end) gaming monitors, designed to reduce eye tracking motion blur (see: Blur Reduction Technology) during gameplay. It is the successor to the company’s Blur Reduction, featuring improved performance and clarity.

Being able to clearly see what’s going in a fast moving game is of vital importance, so most monitor manufacturers now offer their own proprietary version of blur reduction, usually done via a technique which is called ‘backlight strobing.’ BenQ Zowie’s DyAc utilizes a custom algorithm to strobe the backlight to prevent fast moving scenes from blurring, thus potentially improving your own ingame performance.


DyAc in action

Intro


Modern (gaming) displays use LCD (Liquid Crystal Display) technology where, simply put, a light beam passes through thousands of liquid crystals to produce the image on the screen. If you look at a modern display close up you can even see the individual pixels that make up the image. This technology brings a number of advantages with it over the CRT (Cathode Ray Tube) displays of old; displays are now way thinner, they produce less heat, and the image that LCD displays can produce is much, much sharper than what typical CRT displays can put out.

Unfortunately there are also disadvantages: these crystals take a while to ‘close’, which means that the previous image that they were displaying can still be visible for a fraction of a second. This isn’t a huge deal for stationary images, but this can cause motion blur (or ‘ghosting’) on fast-moving objects in the game.

A way to combat this blur is by shortening the amount of time each frame is on screen. That’s done by (for example) producing higher refesh rate monitors, but also by what we call ‘backlight strobing’, i.e. turning the backlight off in between frame refreshes, thus shortening the amount of time that a frame is displayed even more.

DyAc is BenQ Zowie’s backlight strobing technology, which has been specifically designed for (FPS) gaming.



Eye Tracking Motion BlurEye Tracking Motion BlurEye Tracking Motion Blur

How can DyAc and DyAc+ help in games


DyAc is BenQ Zowie’s proprietary algorithm for backlight strobing. It’s specifically designed for reducing the blur on very fast and erratically moving objects, such as, for example, when your screen is shaking due to firing a gun with heavy recoil, or when you’re making quick swipes across the screen. This technology, along with the higher refresh rate of their DyAc enabled gaming monitors, results in a much smoother image when compared to traditional non-gaming focused displays.

If you look at the images on the right you can see that, even with both monitors outputting 144 frames per second, the enemy Zarya (circled in red) can be seen much more clearly on a monitor with DyAc enabled as opposed to on the monitor without DyAc. In fast moving games this can undoubtedly give you an advantage when it comes to tracking the onscreen action and responding appropriately.

DyAc’s flickering is (like most proprietary forms of motion blur reduction nowadays) invisible to the naked eye when it’s on, so it causes no issues with gameplay such as a double image effect. DyAc can be (contrary to popular belief) fully turned off as well, so people who would rather not use it can opt to do so.

DyAc was also (according to BenQ Zowie’s limited information on the subject) developed with controlling ‘shocky’ recoil, such as that from the AK-47 in CSGO in mind, though its use obviously isn’t limited to CSGO only. Since the screen refreshes the image much more fluidly when DyAc is active it becomes way easier to track and control your crosshairs when you’re spraying.

DyAc monitors use a customized LCD panel with changes made to the circuitry and firmware settings to achieve greater clarity in (FPS) games. We’ve already reviewed one of BenQ’s monitors which features DyAc (the BenQ Zowie XL2546) so if you want to check that out you can click here.

Recently Zowie has released a new monitor which has the so called DyAc+ technology. That uses the exact same principles as DyAc to reduce screen shake and aids in controlling recoil.

Update: Zowie has recently released their own article on how DyAc works and can help you perform better, so click here if you want to check that one out!



144Hz monitor without DyAc144Hz monitor with DyAc

44 Comments on “What is DyAc?”

    1. No, not all pros use DyAc. Some of the pros that we have talked to prefer to have it on and some like to have it off. 🙂

      1. Hi there, I would liketo know if DyAc on Zowie XL2546 (240Hz)will still work if the FPS is over 240? Or I need to cap my fps at 240 in order to make DyAc on?

    1. In general it’s not worth it to buy a monitor like this for console gaming. They can only reach a maximum of 60 frames per second, so getting a monitor that can display 240 is overkill. I would strongly consider the RL2455 from BenQ. It has a super low response time and is actually tailor made for console gaming!

    1. Hi! We also have a library article on G-Sync, you can read it here: https://prosettings.net/library/what-is-gsync/

      They’re quite different actually. If you’ve got a good PC and a high refresh rate monitor (which you’ll have if you have a monitor with DyAc) there’s no real need to use G-Sync, because you can easily get enough frames in CS:GO to the point where frame there won’t be any frame tearing.

      Most CS:GO pros are playing on monitors that don’t even support G-Sync, so the answer to your question is DyAc.

    1. Well they both serve different purposes to be honest with you. DyAc is more of a blur reduction technology while G-Sync also serves to eliminate tearing and what not. We’ve got library articles on both, so feel free to read those for a more in-depth explanation! If you can go into more detail about why you’re considering the two (i.e. what kind of framerates you’d like to game at, what games, …) I’d be glad to help you out further though!

  1. I have the dyac version of the xl2546. Should I enable gsync through control pannel or leave it at fixed refresh rate and will I benefit from it. I play games like R6, division 2 and battlefield titles

    1. The XL2546 doesn’t normally feature G-Sync. In any case, we usually don’t fix the refresh rate in any game, once you get to a certain amount of fps there really aren’t that many issues with tearing.

  2. I’m planning to buy this monitor to use with 2070super and R5 3600, say if i get lower frames than 240, then am i better off buying a 165hz gsync monitor or this?
    Game to be played Apex Legends

    1. If you don’t get the required frames you can in theory get away with a 165Hz monitor, but if you’ve got the budget it’s always best to go for a 240Hz monitor if you’re asking us, if you’re gonna be using it mainly for competitive gaming. That way you can use the extra frames if you play less demanding games or you upgrade your rig.

    1. The difference isn’t hugely noticeable to the naked eye in most situations, it’s more of a ‘feeling’ kind of thing. If you’re gaming at over 240 frames per second the game already feels plenty smooth so it’s a bit more difficult to see any real changes. That said; could just be that you’re not as sensitive to the stuff that DyAc is trying to help with; we can’t really say why you’re not seeing a difference with any certainty.

  3. Does it worth it to pay more for DyAc if I want maximum smoothness? But also the price really matter for me. 😀
    Adil Scream advertised on his youtube channel the brand new gaming minitor AORUS KD25F. He say the monitor is really very smooth. But I saw he still uses his old monitor Zowie Banq XL2546 with DyAc on his Twitch stream.
    AORUS KD25F doesn’t have DyAc but has 0,5 millisecond respond time. Smoothness really matter for me not only because fro competetive csgo gaming but I wish to have maximum comfort and expirience for smoothenss. That’s why I ask if I pay more for DyAc or 0,5ms, will I regret it or not? I would appreciate for the full answer, thank you very much!

    1. Whether it’s worth it or not depends on your personal preferences, to be honest. Some people swear by DyAc while others don’t think it does all that much. We don’t really have any extra info on that AORUS monitor so it’s kind of hard for us to say what you should pick, but the XL2546 is the standard monitor in the CS:GO pro scene for a reason so you cannot go wrong with that one if you’re asking us.

  4. Is the benq xl2546, the same as 2540, but just has dyac, or even without dyac the 2546 is better than 2540

  5. Will there be any penalty running 240hz Dyac if the game is demanding and frames drop well below 240hz? no double images or so?

    1. We don’t notice any odd behavior when running DyAc with very demanding games so it should be fine.

    1. Depends, to be honest. It’s probably best to mess around with it a bit for yourself since it varies from game to game and person to person. I have it set to premium for all games I play though.

  6. Hi.
    Which technology would be the best for consistent 240 Hz @ 240 FPS gaming (DyAc, G-Sync etc…) and which are the cons for each (input lag, motion blur, crosstalk etc…)?

    1. It depends, honestly. Some people prefer having DyAc on while some leave it off, some prefer G-Sync, … It’s difficult to say for that reason, but we do talk about blur reduction technologies in various other library articles (60Hz vs 144Hz vs 240Hz and G-Sync vs FreeSync) so feel free to check those out if you haven’t.

  7. Hello

    I used to play cs back in the BETA days before even 1.6 but decided to give up and concentrate on life. However as a side effect of that I now have a son, he plays csgo and is actually pretty good , lvl10 on faceit. I am however looking to improve his monitor being the competitive dad I am. He has a 144hz Zowie BenQ at the moment. I am looking for a monitor purely for csgo. which in your opinion would be better in these 2 : BenQ zowie XL2746S or the MSI251RX which is a new ips panel as you will know. If its of importance his GFX card is a RTX2070

    Thanks

    1. We haven’t tested the XL2746S ourselves, but our reviewer still uses the XL2546 as his main monitor and Zowie monitors are the monitor of choice for most pros and tournament organisers so we’d definitely argue that the XL is worth considering. The MSI might look a bit better thanks to the IPS panel, but that’s a monitor we don’t have hands on experience with so we can’t make any definite claims on that.

  8. Hey could you name or is it listed which pro players use DyAc? Also I have an Alienware 240hz, is Zowie better? For FPS? Or not really

    1. Well, the vast majority of pros are on 240Hz so if you’ve got the budget we’d recommend that. Granted, the difference between 144Hz and 240Hz is less perceivable than the difference between 60hz and 144hz but there definitely is a difference.

  9. It’s also worth noting DyAc is brighter than their non-DyAc technology. BenQ ZOWIE intentionally increased the brightness of DyAc to practically match the non-strobed brightness.

    1. If you’re sure you’re not going to be using it the XL2540 is indeed a perfect alternative. There are no downgrades anywhere on that model so you should be good to go.

    1. DyAc+ is an upgraded version of DyAc but Zowie hasn’t really released any detailed comparisons or technical documentation yet so we can’t really say for sure.

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