Put a 60Hz and a 120Hz ultrawide side by side and drag a window across either one, and the difference stops being a marketing number and becomes something you can see with your own eyes in about two seconds. 120Hz versus 60Hz on an ultrawide is a genuine, measurable jump, and the maths behind it explains exactly why.
Quick Answer
Do the arithmetic and the jump stops being a marketing number: 60Hz redraws every 16.7 milliseconds, 120Hz cuts that gap exactly in half to 8.3, and that missing half is what turns visibly stepped motion into something that reads as continuous. This shows up in dragging windows and scrolling documents just as clearly as it does in games. The R5,999 AOC CU34B3E runs 120Hz over DisplayPort 1.4 at the panel's full 3440x1440 width, with no compromise needed to reach either the resolution or the refresh rate together.
🔢 The frame-time maths, made concrete
Refresh rate numbers become meaningful once converted into the actual time gap between updates, rather than left as an abstract "Hz" figure.
A 60Hz screen updates its image every 16.7 milliseconds. A 120Hz screen updates every 8.3 milliseconds, exactly half the gap. That halved interval is what your eyes actually register as smoothness: less time between what the screen showed a moment ago and what it shows now, meaning less apparent gap for motion to blur or stutter across.
🖱️ Where the difference shows up in ordinary desktop use
This is the part most people discover only after already owning a 120Hz screen, since it rarely gets mentioned alongside gaming benchmarks.
Drag any window across a 120Hz desktop and its outline stays crisp the whole way, whereas the same drag on a 60Hz screen visibly smears because the position simply gets updated less often. The same logic covers a mouse cursor flicked quickly across the screen, and a long page scrolled at speed, both of which read as noticeably steadier at the higher rate. None of that needs an app built specifically for high refresh rates; it is purely a property of how often the display itself redraws.
🎮 Where the difference shows up in gaming
Gaming is where 120Hz gets marketed most heavily, and the benefit here is real, provided one other piece of the chain cooperates.
Fast motion, quick camera pans and rapid reactions all become easier to track accurately at 120Hz, since less motion blur sits between consecutive frames. Getting there in full depends on your graphics card keeping pace: a heavy, visually rich title pushed to its highest settings can leave a mid-range card well short of 120 frames per second, in which case the screen simply shows whatever rate the card actually manages. Even a partial climb toward that ceiling, say from 60 to 90 frames per second, still reads as noticeably smoother than staying capped at 60Hz outright.
📶 Why bandwidth matters for reaching both numbers together
Getting the panel's top resolution and its top refresh rate at the same time comes down entirely to whether the cable in use can carry enough bandwidth for both together.
DisplayPort 1.4's bandwidth, close to 26Gbps, has enough headroom to carry the full 3440x1440 picture and the full 120Hz refresh together, a combination that pushes HDMI 2.0's roughly 18Gbps past its limit and forces a drop in one figure or the other. Making sure the cable running from your graphics card to the CU34B3E is DisplayPort, not HDMI, is what actually unlocks both numbers at once rather than a compromise on either.
120Hz options turn up at a range of price points in both the office monitor range and the gaming-focused lineup, and the top sellers page shows which ones buyers are actually picking right now.
Frequently Asked Questions
Is the jump from 60Hz to 120Hz noticeable outside of gaming?
Yes, clearly. Moving the mouse, dragging a window and flicking through a long page all look and feel sharper, none of which has anything to do with gaming specifically.
Will a budget graphics card still show an improvement at 120Hz?
Yes, for ordinary desktop tasks a budget card is plenty. In games, a weaker card simply tops out at a lower frame rate, which is still smoother than a 60Hz screen even without reaching the full 120.
Can HDMI run this monitor at 120Hz?
Not at the full 3440x1440 resolution simultaneously, since HDMI 2.0's bandwidth falls short of that combination. Use DisplayPort 1.4 for both together.
Is 120Hz worth the extra cost over a 60Hz ultrawide?
For most buyers, yes, given the noticeable everyday improvement to cursor tracking and scrolling, in addition to the gaming benefit.
Does 120Hz require special software to work?
No. It works automatically once correctly configured in Windows and connected via a cable with sufficient bandwidth, with no additional software required.
Ready to see the difference for yourself?
Compare dragging a window and scrolling a document on a 60Hz screen against a 120Hz one before judging by gaming alone.