When Did 240Hz Monitors Come Out? Native Refresh vs Turbo 240

01What counts as a real 240Hz monitor?

A native 240Hz display can accept and refresh at a supported 240Hz timing, providing up to 240 opportunities per second to show newly supplied frames. That does not mean every image will be unique: the computer must produce sufficiently frequent new frames, and synchronization settings affect delivery. The monitor supplies the display capability; it does not manufacture the game’s rendering performance.

Backlight strobing addresses another part of motion clarity. Instead of keeping an image continuously visible, a display can limit how long the backlight illuminates each image. That can change perceived motion persistence without accepting 240 different game frames every second. A marketing number associated with the backlight therefore needs a separate explanation from input refresh rate.

This is why I would check the supported input timings in an old monitor’s manual before calling it a native 240Hz product. A headline about a fast backlight, an advertised response-time figure, and a list of accepted resolutions describe different things. The manual’s actual signal table is much closer to the question a buyer needs answered.

02The milestones that explain the conflicting dates

EIZO’s October 2013 announcement explicitly describes converting 120Hz signals through control of the LED backlight. That is the reason the earlier date appears in display histories. It should remain part of the story, but it should not be used as evidence that the model accepted 240 unique input frames each second.

ASUS’s May 2016 Computex announcement identifies the PG258Q as native 240Hz. Its later September article also describes that capability and tells readers to look for it in early 2017. Together, those statements show why an announcement date and an availability date can both appear beside the same product without either being a typo.

BenQ’s original launch announcement is dated November 7, 2016 and identifies the XL2540’s native 240Hz capability. The announcement also describes a demonstration later that month. A demonstration event is evidence of public presentation, rather than proof that every region had retail stock on that day.

03Why there is no responsible universal first-sale date here

“Came out” can mean unveiled at a trade show, announced in a press release, sent to reviewers, opened for preorder, or actually stocked by a local retailer. These events need not happen in the same month. Regional distribution creates another difference: a product can reach one country before another.

I would not turn the available announcements into an unsupported claim about the first person in the world to buy a native 240Hz monitor. Establishing that would require more specific sales evidence across competing products and markets. The safer historical conclusion is a launch window, backed by named products and dated manufacturer announcements.

For a school project or a buying-history explanation, write the definition alongside the date. “Native 240Hz gaming LCDs were announced in 2016, with early products arriving around the 2016–2017 transition” is more informative than simply writing “240Hz was invented in 2017.” It also avoids implying that all high-frequency display technologies began with those gaming LCDs.

04What 240Hz changes mathematically

The interval between refresh opportunities is 1,000 divided by the refresh rate, expressed in milliseconds. At 60Hz it is about 16.67ms; at 120Hz, 8.33ms; at 144Hz, 6.94ms; and at 240Hz, 4.17ms. These are calculated timing intervals, not measurements of total system latency.

The distinction matters because an input passes through several stages before its result becomes visible. Game simulation, CPU and GPU work, render queues, synchronization, display scanning and pixel transitions can all contribute. You cannot take the 4.17ms refresh interval and advertise it as the complete mouse-to-screen delay of every 240Hz setup.

There are diminishing absolute timing reductions as refresh rates rise. Moving from 60Hz to 120Hz halves the interval by about 8.33ms; moving from 120Hz to 240Hz halves it again, but the reduction is about 4.17ms. Both changes can matter, yet doubling the number does not create the same absolute timing difference at every starting point.

05Refresh rate, response time and FPS are separate

Refresh rate describes display updates. Response time describes how quickly pixels change between states, and manufacturers may quote it using different measurement conditions. FPS describes the rate at which frames are produced or presented by the software pipeline. None of these numbers can stand in for all the others.

A 240Hz screen with slow transitions can still show trailing artifacts. An aggressive overdrive setting can replace some blur with bright or dark inverse trails. Conversely, a low advertised response-time number does not prove a display accepts a 240Hz signal. I would inspect motion behavior and supported timings separately when evaluating an old model.

Nor does a 240Hz monitor require every game to run at precisely 240fps just to function. Lower-rate content still displays. The practical question is how much of the refresh capacity your usual games can use, whether frame pacing is consistent, and how synchronization behaves within the supported operating range.

06What the history means if you are buying one now

The first generation’s age is useful context, but it is not a quality ranking for later products. Resolution, panel behavior, contrast, HDR performance, ports and ergonomics can differ substantially between monitors that share the same maximum refresh rate. “240Hz” describes one capability rather than an entire viewing experience.

For a used model, I would start with the exact model number and its manual. Check which input supports the desired resolution at 240Hz, whether an adapter or dock changes the available timings, and whether the computer can output the signal. The connector’s physical shape alone is not enough to establish the complete connection path’s capabilities.

After connecting, check the active refresh rate rather than assuming it changed automatically. In Windows 11, the relevant controls are under Settings, System, Display, Advanced display. Select the intended monitor if more than one is attached, then choose a supported refresh rate. If 240Hz is absent, investigate the model’s timing table and connection before blaming the panel.

For competitive games that already run at high, steady frame rates, a responsive 240Hz display can be a sensible priority. For visually demanding games running much more slowly, I would also weigh resolution and image quality. The historical milestone tells you when the feature arrived; your actual workload tells you whether it deserves your budget.

07Questions that the date alone cannot answer

Was every monitor advertised as 240Hz native 240Hz?

No. Some historical claims described motion-processing or backlight behavior. Look for the accepted input frequency and an explicit explanation of the technology instead of relying on the largest number in an advertisement.

Does 240Hz mean the game runs at 240fps?

No. The graphics workload and computer determine the frame output. A faster monitor can display frames more frequently when they arrive, but changing the screen does not remove a CPU or GPU performance limit.

Does the arrival of faster displays make an older 240Hz model useless?

No. Judge its condition, signal support and actual motion behavior against your needs. A historical release date does not tell you whether its stand is suitable, its ports fit your computer, or its panel has developed faults.

08Use the definition before the date

For native 240Hz gaming LCDs, use the 2016–2017 arrival window and distinguish announcements from local retail stock. Mention 2013 only with the explanation of EIZO’s 120Hz-input Turbo 240 system. If you are checking a specific old monitor, its supported signal timing is the next useful fact to verify.