Monitor Buying Guide
This guide recommends no models and quotes no prices. It explains what each specification means, and shows which of them you can check yourself the day the monitor arrives.
Decide size and resolution first, because they set how much you see and how sharp it looks; everything else is refinement. Treat quoted response times as the maker's own figure measured their way — BenQ explains that gray-to-gray measures how long a pixel takes to change between gray values, while moving picture response time measures how long a pixel stays visible and is "very subjective". Then check what you actually received: dead pixels, backlight bleed, uniformity, refresh rate and color, all before the return window closes.
Most monitor advice is a list of models that will be out of date in a year. This is the other kind: what the numbers on the box mean, which ones matter for what you do, and how to check the screen that actually turns up.
Start with size and resolution
These two decide more than anything else on the specification sheet, because together they decide how much you can see and how sharp it looks.
Resolution is the number of pixels; size is how far apart they are spread. The same 4K resolution is razor sharp on a 27-inch screen and merely normal on a 43-inch one. If you sit close, a smaller screen at a given resolution looks sharper; if you sit back, a larger one at the same resolution is perfectly fine.
Whatever you choose, run the display at its native resolution. Anything else is being stretched, and fine detail does not survive stretching — which the Sharpness Test shows in a few seconds.
Panel type, in one paragraph each
IPS
Color and viewing angle are its strengths: the picture changes least as you move off-center. Its black is usually the weakest of the three, which is why edge glow is most visible on an IPS panel in a dark room.
VA
Deeper black than IPS, so contrast looks stronger, at the cost of more shift when you move off-center and, on some panels, slower transitions in dark scenes.
OLED
Each pixel makes its own light, so black is genuinely black. The trade-off is the risk of permanent image retention from static elements, which is why makers build panel-care routines in.
What to do about it
Check the thing you care about rather than the label: the Viewing Angle Test for shift, the Screen Contrast Test for shadow detail, and the OLED Burn-In Test if you buy OLED.
Refresh rate and response time
Refresh rate is how many times a second the screen can redraw. It is only useful if your computer can produce that many frames: a fast screen fed sixty frames a second shows sixty frames a second, and the rest of the panel’s ability sits idle. The Refresh Rate Test estimates what your browser is actually drawing, which is a good sanity check after setting up a new screen — though it is an estimate from frame timing, not a reading from the hardware.
Response time is where specification sheets get slippery, and it is worth knowing what is being measured.
| Figure | What BenQ says it measures |
|---|---|
| Gray-to-gray (GtG) | "How long it takes a pixel to change from one grey value to another grey value" — described as the closest to a hardware-level indication, and not affected by post-processing or frame rate |
| Moving picture response time (MPRT) | "How long a pixel remains apparent or visible on the screen", with the note that "the longer a pixel stays visible, the more blur or trail a moving image creates" — and that this figure is "very subjective" and depends on frame rate |
Two monitors can both claim 1 ms and mean different things, because they measured different things.
BenQ’s own summary is that moving picture response time is better than gray-to-gray for anticipating ghosting and blur, while being the more subjective of the two. A browser cannot check either figure. What it can show you is the result: the Motion Blur Test for how a moving object smears, and the Screen Tearing Test for torn frames.
Connections, and what they limit
The cable decides the ceiling. A monitor capable of a high resolution at a high refresh rate will do nothing of the sort through a connection or cable that cannot carry both at once, and the symptom is usually a silently lower refresh rate rather than an error message. Check the port on your computer, the port on the monitor, and the cable in between, and confirm the rate you actually got afterwards rather than assuming.
Variable refresh rate, sold under several brand names, lets the screen redraw when the frame is ready instead of on a fixed schedule. It reduces tearing; it does not make frames arrive faster.
The checks to run before the return window closes
This is the part of buying a monitor that most people skip, and it is the part with a deadline.
- 1
Run the Monitor Test in its own order: white, black, red, green, blue, then gray. That covers dead pixels, bright pixels and gross uniformity problems.
- 2
Check backlight bleed properly with the Backlight Bleed Test: in the dark to see it, then in normal room light to judge it, because that is the lighting makers use.
- 3
Look at uniformity with the Screen Uniformity Test at all three gray levels, straight on.
- 4
Confirm the refresh rate you are actually getting, and check motion with the Motion Blur Test.
- 5
Photograph anything you find from a normal distance, and read your maker's own pixel policy before deciding whether to return it.
Matching the screen to what you actually do
The specification that matters depends entirely on the work.
| What you do | What to weigh | What to check on arrival |
|---|---|---|
| Text, code, spreadsheets | Resolution and size, because sharpness and space decide comfort; refresh rate barely matters | Sharpness Test at 100% zoom, and uniformity for tint drift across a wide screen |
| Photos and design | Color behavior and viewing angle; a wide gamut is only useful if your software manages color | Color Accuracy Test, Gamma Test and banding |
| Games | Refresh rate you can actually feed, motion behavior, and variable refresh support | Refresh Rate, Motion Blur and Tearing |
| Film and dark-room viewing | Contrast and black level, where panel type matters most | Screen Contrast Test and Backlight Bleed Test |
A specification that does not serve the work is money spent on a number. The most common example is a high refresh rate bought for a machine that cannot feed it, and the second most common is a wide color gamut on a desk where nothing is color managed, which can make ordinary pictures look oversaturated rather than better.
If a check fails
Finding a fault is not the end of the story, and the useful question is whose rule applies. Pixel faults are judged by the maker’s own published policy, and those policies differ by manufacturer, product line and region — the warranty policies guide quotes several of them with the dates they were read. Backlight bleed is judged under the lighting the maker names rather than in a dark room, which the bleed guide covers.
Two practical points. A retailer’s return window is usually simpler than any maker’s policy, so check the shop first while the box is still by the door. And whatever you found, photograph it from a normal viewing distance rather than with the camera against the glass: that is the distance the maker uses to assess it.
What no specification tells you
How it looks on your desk. Whether the stand adjusts to your height. Whether the coating suits your room’s light. Whether the menu system is bearable. None of that appears on a specification sheet, and all of it decides whether you are still happy in a year.
The specifications are a filter, not an answer: they narrow the field, and your own eyes close it. The tools here exist for the part between those two, when the box is open and the question is whether this particular screen is good enough to keep.
Questions
Does this guide recommend a monitor?
No, deliberately. Models and prices change constantly and vary by country, so a recommendation written today would mislead someone reading next year. What does not change is what the specifications mean and how to check your own screen against them.
Is a 1 ms monitor really faster than a 4 ms one?
Sometimes, and the number alone does not tell you. BenQ describes gray-to-gray as measuring how long a pixel takes to change from one gray value to another, and moving picture response time as measuring how long a pixel stays visible, calling the latter "very subjective" and dependent on frame rate. Two makers quoting 1 ms may have measured different things.
How much refresh rate do I need?
More than your computer can feed it is wasted, and the tools here can show you what you actually get. The Refresh Rate Test reports the rate your browser is drawing at, which is an estimate from frame timing rather than a hardware reading.
What should I check first when it arrives?
Run the Monitor Test in the order it uses: white, black, the primaries, then gray. That covers dead pixels, backlight bleed and uniformity in a few minutes, which are the faults a return window exists for.
Are curved or ultrawide screens better?
They are different, not better. Both change how much you see without changing image quality, and both are personal preferences that no specification can settle for you.
How this guide was made
The response-time definitions are quoted from BenQ's own knowledge center page, with the date it was read. Everything about checking a monitor after purchase describes what ScreenTail's own tools do, from the tools as they are built.
No models, no prices and no affiliate links: this is the first version of the guide, and the roadmap records that Wave 2 carries none. No panel-technology verdicts either — IPS, VA and OLED are described by what they do rather than ranked — and no response-time or refresh-rate figures beyond the definitions, because those are per product and a browser cannot verify them.
- 01The definitions of gray-to-gray and moving picture response time, what each measures, and that moving picture response time is subjective and frame-rate dependent: BenQ, How is Monitor Response Time Measured? — retrieved Sep 23, 2026.