Owen Bradley Two numbers dominate monitor marketing, and most buyers understand neither. Refresh rate is quoted in hertz and sounds like speed. Response time is quoted in milliseconds and also sounds like speed. They measure completely different things, they fail in completely different ways, and one of them is far more often exaggerated on the box than the other. This guide separates response time from refresh rate in plain language, explains what GtG and MPRT figures actually describe, and shows which specification deserves your money depending on whether you play competitive shooters, story-driven games, or spend most of the day in a spreadsheet. Read it once and monitor spec sheets will stop being a guessing game in 2026.
Refresh Rate: How Often the Screen Updates
Refresh rate is the number of times per second a monitor redraws its entire image, measured in hertz. A 60Hz panel produces 60 fresh images every second, one roughly every 16.7 milliseconds. A 144Hz panel produces one every 6.9 milliseconds, and a 240Hz panel every 4.2 milliseconds.
Two things follow from that. First, motion looks smoother, because the gap between images shrinks and your eyes receive more intermediate positions of a moving object. Second, and less obvious, the screen shows you newer information sooner. On a 60Hz panel, an event can wait up to 16.7 milliseconds before appearing at all. On a 240Hz panel, that worst case drops to 4.2 milliseconds. In competitive play, that reduction in waiting is often more valuable than the visual smoothness.
The Diminishing Returns Curve
Going from 60Hz to 144Hz is the single most noticeable monitor upgrade most people ever make. Every window drag, scroll and mouse movement changes character immediately. Going from 144Hz to 240Hz is a real but much smaller improvement, and from 240Hz to 360Hz smaller still. The reason is arithmetic: the first jump cuts the frame interval by nearly 10 milliseconds, while the last cuts it by barely one. Spend your budget where the curve is steepest unless you compete seriously.
Response Time: How Fast a Pixel Changes Colour
Response time measures how long an individual pixel takes to shift from one colour to another. It says nothing about how often the screen updates. If pixels change too slowly relative to the refresh interval, the previous image lingers faintly behind moving objects, which is the smearing effect commonly called ghosting.
The relationship between the two specs is the key insight. Response time only needs to be fast enough to keep up with the refresh rate. A 240Hz panel gives each frame 4.2 milliseconds of life, so pixel transitions slower than that will visibly blur. A 60Hz panel gives each frame 16.7 milliseconds, so even a fairly slow panel keeps up. This is why response time matters more as refresh rate rises, and why the two specifications should always be judged together rather than separately.
GtG Versus MPRT
Manufacturers quote response time in two different ways, and confusing them leads to bad purchases. GtG, or grey to grey, measures the transition between two mid-tone grey values, which is the easiest and fastest transition a panel makes. Quoted GtG figures are usually best-case results from the fastest transition with maximum overdrive applied, so a claimed 1ms often means real-world transitions closer to 3 to 5 milliseconds across the full colour range.
MPRT, or moving picture response time, measures perceived motion blur rather than pixel transitions. A very low MPRT figure is frequently achieved by strobing the backlight, which cuts blur convincingly but also cuts brightness substantially and can introduce flicker. Neither number is dishonest exactly, but both are optimistic. Treat quoted response times as a rough class indicator, not a precise measurement, and rely on independent testing for a true picture.
Which One Should You Prioritise?
For most buyers, refresh rate deserves the first claim on your budget, for a simple reason: refresh rate specifications are honest and directly experienced, while response time specifications are marketing-optimised and only matter once they fall behind the refresh interval. A 144Hz panel with genuine 4ms transitions will feel far better than a 60Hz panel advertising 1ms.
That said, the balance shifts as you climb. At 60Hz, response time is almost irrelevant because there is plenty of time per frame. At 144Hz it starts to matter and a genuinely slow panel will smear. At 240Hz and above, response time becomes the limiting factor, and a panel that cannot transition inside roughly four milliseconds is wasting its own refresh rate. If you are shopping in the high-refresh tiers, look at the best 144Hz monitors as the value entry point, then compare against the best 240Hz monitors if fast transitions are confirmed.
Panel Technology Sets the Ceiling
The underlying panel type largely determines what response times are achievable. TN panels have historically been the fastest and are still common in budget high-refresh models, though their colour and viewing angles are weaker. Modern fast IPS panels have closed much of the speed gap while offering far better colour, making them the mainstream choice for high-refresh gaming. VA panels deliver the deepest contrast but tend to be slowest on dark transitions, which shows up as smearing in shadowy scenes. OLED panels have near-instant pixel transitions, effectively removing response time from the equation entirely.
Where the Rest of the Latency Hides
Neither specification tells the whole story of how responsive a screen feels. Input lag, the delay between your computer sending an image and the monitor beginning to display it, comes from the panel’s internal processing and is measured separately. A monitor with excellent response time can still feel sluggish if its processing adds a dozen milliseconds of lag, which is common on models with heavy image-enhancement features enabled.
The full chain also includes your mouse polling rate, the game engine, and how many frames your graphics card produces. A 360Hz monitor fed 80 frames per second by an overloaded graphics card cannot deliver the responsiveness it is capable of. If low total latency is your goal rather than a single headline spec, the best low latency monitors guide focuses on panels measured for real end-to-end delay rather than advertised figures.
Overdrive: Help and Hazard
Overdrive pushes pixels harder to make them transition faster, and every gaming monitor includes it under some brand name. Used moderately, it genuinely reduces smearing. Pushed too far, it overshoots the target colour and produces inverse ghosting, a bright halo trailing moving objects, which looks worse than the blur it replaced. Most panels have three or four overdrive levels, and the correct setting is often the middle one rather than the maximum. Test with a moving-object pattern and choose the highest level that shows no bright trail.
Choosing by How You Use the Screen
- Competitive shooters: Prioritise refresh rate first, then verified response time. 240Hz with genuinely fast transitions is the serious tier.
- Story and open-world games: 144Hz is plenty. Spend the remainder on contrast, colour and resolution instead.
- Racing and simulation: Response time matters more than usual because the whole scene moves constantly. Avoid slow VA panels.
- Office and productivity: Any refresh above 60Hz makes scrolling nicer, but 120Hz is a comfortable ceiling. Response time is a non-issue.
- Creative work: Neither spec should lead. Colour accuracy, uniformity and resolution matter far more.
If your priority is the competitive end of the scale, panels built specifically for tournament-style play are covered in the best monitors for esports guide, while the ceiling of current refresh technology sits in the best 360Hz monitors selection.
Common Mistakes When Comparing Specs
The first and biggest mistake is buying a 1ms claim over a higher refresh rate. That 1ms figure is a best-case grey-to-grey result and rarely reflects real-world performance across all transitions, whereas a higher hertz rating is a hard specification you experience continuously. The second mistake is buying a high refresh panel your graphics card cannot feed. A 240Hz screen running at 90 frames per second delivers the responsiveness of a 90Hz setup, minus the money.
Another frequent error is assuming the panel arrives configured correctly. Many monitors ship at 60Hz by default and must be switched to their rated refresh in display settings, and plenty of owners never notice. A related trap is using a cable or port that cannot carry the full resolution and refresh combination. Finally, some buyers chase MPRT figures achieved through backlight strobing without realising the mode dims the screen considerably and often cannot run alongside adaptive sync.
Frequently Asked Questions
Is 1ms response time actually important?
Less than the marketing suggests. Once a panel transitions comfortably faster than its refresh interval, further reductions are hard to perceive. A verified 3ms panel at 165Hz will look excellent, while a claimed 1ms panel at 60Hz will not.
Do I need more than 144Hz?
Only if you play competitively and your hardware can sustain high frame rates. For most players and all office use, 144Hz already captures the large majority of the benefit over 60Hz.
Does refresh rate matter for normal desktop work?
Yes, modestly. Scrolling text and moving windows look noticeably clearer above 60Hz, and some people find it easier on the eyes. It is a comfort improvement rather than a productivity one.
Why does my monitor still look blurry at high refresh?
Common causes are a low frame rate from the graphics card, the panel still set to 60Hz in display settings, an overdrive level set too low, or a VA panel struggling with dark transitions. Check the settings before assuming the panel is at fault.
Final Thoughts
Refresh rate and response time are partners, not rivals. Refresh rate sets how often you receive new information and is the specification you feel constantly, so it should lead your decision, especially on the jump from 60Hz to 144Hz. Response time only needs to be fast enough to keep pace with that refresh interval, and its advertised figures deserve healthy scepticism. Check that your graphics card can actually feed the panel, confirm the refresh rate is enabled after unboxing, tune overdrive sensibly, and remember that panel technology sets the real ceiling. Approach the specs that way in 2026 and you will buy responsiveness you can genuinely feel rather than numbers that only look good in an advert.
