DyAc, short for Dynamic Accuracy, is BenQ’s backlight-strobing motion blur reduction found on its ZOWIE esports monitors. Its whole reason to exist is to make recoil patterns, flick shots, and fast tracking look sharper so you can react to what is actually on screen instead of a smear. This guide breaks down how DyAc and the newer DyAc 2 work, what they cost you, and who should care.
The blur DyAc is fighting
Every modern flat panel holds each frame until the next one draws, and your tracking eyes turn that hold time into perceived blur. A 240Hz panel already keeps a frame lit for only about 4.2ms, but during rapid spray-downs or sudden camera turns even that can wash out fine detail. DyAc inserts a black period and flashes the backlight briefly each frame, so your eye samples the image for a much shorter slice of time and the picture snaps into focus.
DyAc vs DyAc 2
The original DyAc (and DyAc+) delivered strong clarity but often introduced some strobe crosstalk, a faint ghost image near the top or bottom of the screen, and reduced brightness. DyAc 2 refines the pulse timing and overdrive tuning to cut that crosstalk and lift usable brightness, while pairing with higher native refresh rates. The practical result is cleaner tracking with fewer artifacts and less of the dim, washed-out look older strobing modes were known for.
| Feature | DyAc / DyAc+ | DyAc 2 |
|---|---|---|
| Typical native refresh paired | 240Hz | 240-360Hz+ |
| Strobe crosstalk | Noticeable in zones | Reduced |
| Brightness in mode | Lower (~150-200 nits) | Higher (~200-250 nits) |
| Tuning options | High / Low toggle | Finer adjustment |
| Best for | CS, Valorant sprays | Same, with fewer artifacts |
What it costs you
Brightness
Because the backlight is dark most of each frame, strobed brightness lands well below the panel’s normal SDR peak. In a bright room you may find it dimmer than you like, so DyAc suits controlled lighting best.
No variable refresh at the same time
Like all strobing, DyAc needs a fixed refresh cadence, so it cannot run alongside FreeSync or G-Sync. You want a framerate that stays pinned near the panel’s refresh; if your framerate dips and swings, you will see stutter instead of the clean motion DyAc promises.
Who should turn it on
DyAc shines for tactical and arena shooters where reading recoil and tracking flicks matters more than raw color or HDR. If you can hold 240fps in CS2 or Valorant, enabling DyAc 2 gives a clarity edge a plain sample-and-hold 240Hz panel simply cannot match. For single-player, HDR, or creative work, leave it off and keep adaptive sync and full brightness instead.
Getting clean results from DyAc
DyAc rewards a stable, high framerate above all else. Because the backlight flashes once per frame, the mode assumes a steady cadence at the panel’s refresh, so aim to hold 240fps in your competitive titles. If your framerate swings wildly, the strobing exposes that inconsistency as judder, undoing the clarity benefit. Trim graphics settings until your framerate is rock-solid near the refresh ceiling.
High vs low DyAc levels
ZOWIE monitors typically offer more than one DyAc strength. A higher level shortens the lit window for maximum motion clarity but dims the image and can be more fatiguing; a lower level keeps things a bit brighter and gentler on the eyes. Many players run the higher setting for a serious ranked session in a controlled-light room, then drop to the lower level or turn it off entirely for casual or single-player play.
Room and eye comfort
Because strobing is essentially a controlled flicker, sit in consistent lighting and take breaks on long sessions. If you feel eye strain, step down a DyAc level or disable it outside ranked play. The feature is a competitive tool, so treat it as something you toggle for specific games rather than leaving on permanently for every task on the desktop.
FAQ
Is DyAc worth it over just buying a higher refresh monitor?
They solve the same problem differently and stack conceptually, but you cannot use strobing and VRR together. A 360Hz panel without strobing may satisfy many players, while DyAc 2 pushes perceived clarity beyond what refresh alone achieves at the cost of brightness and adaptive sync.
Does DyAc cause eye strain?
Some people are sensitive to the strobing flicker, especially at lower settings, much like PWM dimming. If you notice fatigue, use the lower DyAc level or disable it for long non-competitive sessions.
Bottom line
DyAc and DyAc 2 are among the best-implemented strobing modes on the market, built specifically for competitive shooters. DyAc 2 trims the old downsides of crosstalk and dimness. Enable it when you can feed the panel a high, stable framerate and play in controlled light; skip it when you want VRR, HDR, or maximum brightness.
