Monitor spec sheets love to shout “1ms” as if it settles the argument, but that single number hides two completely different measurements: GtG and MPRT. They describe different things, are gathered in different ways, and a monitor can be brilliant at one while mediocre at the other. If you buy for fast-paced games, understanding the gap saves you from marketing traps.
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ASUS TUF Gaming VG27AQ3A 27 Inch 1440p 180Hz14.4" x 24.2" x 2.1"24.2 x 8.4 x 17.9 inches10.1 poundsCheck on AmazonPros & cons
- 180Hz QHD panel with 1ms response suits competitive play
- ELMB Sync combines low blur with variable refresh rate
- Wide 130% sRGB gamut aids color-accurate visuals
- At over 10 pounds, it needs a sturdy desk or mount
- HDR10 support is basic compared to premium HDR tiers
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Two clocks measuring two problems
GtG: how fast a pixel changes color
Gray-to-Gray measures how long a pixel takes to shift from one shade to another, for example from 50% gray to 80% gray. This is the physical speed of the liquid crystal or OLED subpixel. Lower is better because slow transitions smear moving edges into a trail, the effect gamers call ghosting. Modern fast IPS panels sit around 3 to 5ms real-world GtG, VA panels often 4 to 8ms on dark transitions, and OLED near 0.1 to 0.3ms.
MPRT: how long a frame stays on your eye
Moving Picture Response Time measures perceived blur caused by the display holding a static frame while your eyes keep tracking motion. This is sample-and-hold blur, and it depends on refresh rate, not pixel chemistry. You reduce MPRT by raising refresh rate or by strobing the backlight (black frame insertion), which is why a “1ms MPRT” claim usually means a strobing mode is switched on.
Why the same monitor shows two very different numbers
Because GtG and MPRT attack different causes of blur, they rarely match. The table shows typical figures so you can see how a panel can claim a headline 1ms while its honest pixel speed is slower.
| Panel type | Typical real GtG | MPRT at 144Hz | MPRT with strobing |
|---|---|---|---|
| Fast IPS | 3-5 ms | ~6.9 ms | ~1-2 ms |
| VA | 4-8 ms | ~6.9 ms | ~2-3 ms |
| OLED / QD-OLED | 0.1-0.3 ms | ~6.9 ms | N/A (near instant pixels) |
| TN (esports) | 1-3 ms | ~6.9 ms | ~1 ms |
What to prioritize for your games
For competitive shooters, low GtG plus a high refresh rate gives clean, tearing-free motion without the brightness loss that strobing causes. If you chase the absolute sharpest motion and can tolerate a dimmer, sometimes flickery image, an MPRT strobing mode helps, but it disables adaptive sync on many monitors. OLED sidesteps most of the argument by having near-instant GtG, so its remaining blur is pure sample-and-hold you cut only by raising Hz.
Overdrive: the setting that ties them together
GtG is not a fixed value; it changes with your monitor’s overdrive setting, which pushes extra voltage to speed up pixel transitions. Too little overdrive leaves slow, smeary GtG and visible ghosting. Too much causes overshoot, where pixels overshoot the target shade and leave a bright inverse-ghost trail, which is arguably worse. The sweet spot is a middle overdrive setting that most reviewers identify per model, and it is why manufacturer GtG claims, measured at maximum overdrive, often do not match real-world usable settings.
Reading reviews the right way
Trust independent motion testing over spec-sheet numbers. Reviewers photograph a moving pattern at each overdrive level and report the best balance of speed and overshoot, along with a realistic average GtG. That figure tells you how the panel behaves at a usable setting, unlike the marketing 1ms that may require an overshoot-heavy mode. Pair a good real GtG with a high refresh rate and the appropriate overdrive level, and you get clean motion without chasing a single misleading number.
FAQ
Is a 1ms MPRT monitor faster than a 1ms GtG monitor?
Not comparable directly. A 1ms MPRT usually means backlight strobing is active and says nothing about pixel speed, while 1ms GtG describes pixel transition speed with no strobing. Check which number the spec lists and whether strobing must be on to hit it.
Does higher refresh rate lower MPRT on its own?
Yes. Doubling refresh roughly halves sample-and-hold blur, so 240Hz shows about half the persistence blur of 120Hz even without any strobing. That is a big reason high-Hz panels look cleaner in motion.
Bottom line
GtG is pixel chemistry; MPRT is how long a frame lingers on your retina. A trustworthy fast monitor pairs a genuinely low GtG with a high refresh rate, and treats any “1ms MPRT” strobing mode as an optional extra rather than the headline. Read both numbers, and note whether strobing has to be enabled, before you trust a spec sheet.
