Quick Answer
A 0.5ms MPRT figure and a 1ms GtG figure measure different behaviour, so they cannot be ranked directly. MPRT concerns how long a moving image remains visible, while GtG times a pixel changing between grey levels under set conditions. Read each label as evidence about a specific test, then judge the monitor by the motion you see in the refresh-rate and game conditions you use.
Why the labels are not interchangeable
Response-time marketing compresses several kinds of display behaviour into a short number. That can be useful when you understand the measurement, but confusing when two labels are treated as if they describe exactly the same event. A smaller number under one method is not automatically better than a larger number under another method.
GtG means grey-to-grey. It describes the time a pixel takes to change from one grey level to another. Because pixels can travel between many different shade pairs, a quoted GtG result normally reflects a selected transition and selected monitor conditions. Other transitions may be faster or slower.
MPRT means moving picture response time. It describes how long a moving image remains visible to the eye. It is influenced by the way the display presents motion and may involve techniques such as backlight strobing or other display behaviour. It is not simply a stopwatch for the same pixel transition used in a GtG measurement.
Explore gaming monitors and monitor accessories with a clear understanding of the terms.
What GtG tells you
A GtG number can help you ask whether a display might show trailing during fast motion. If pixel transitions are slow, an object moving across the screen may leave a soft shadow or smear because the previous shades have not settled before the next frame appears.
The test conditions matter. A monitor may offer response-time or overdrive modes that change how aggressively pixels are driven. A more aggressive setting can reduce one kind of trailing but create overshoot, where a pixel briefly goes past the intended shade. That may appear as an inverse ghost or a bright edge behind movement.
When you see a 1ms GtG claim, ask what mode it represents and whether that mode looks good at the refresh rates you intend to use. A setting that works at the maximum refresh may look different when the game runs at a lower frame rate. The best result is clean motion without distracting halos, not the smallest printed number.
What MPRT tells you
MPRT is more closely connected to perceived moving-image clarity. A display may have fast pixel transitions but still show a moving object for a period that your eyes perceive as blur. The way frames persist on screen affects this part of the experience.
A 0.5ms MPRT figure therefore should not be subtracted from a 1ms GtG figure or treated as half the same value. The tests answer different questions. MPRT can be useful when considering how a moving image may be perceived, while GtG can be useful when considering individual pixel transitions.
The Lenovo Legion 27Q-10 is specified with a 0.5ms MPRT response figure. That is the product-specific response-time claim available for this monitor. It should be read as MPRT, not translated into an unlisted GtG rating.
Put response time alongside refresh rate
Refresh rate tells you how frequently the screen can update. At 240Hz, a new refresh opportunity occurs about every 4.17ms. Response behaviour and refresh timing work together: a high-refresh display benefits from pixels that can settle quickly enough for the content, but a response number alone does not define every aspect of motion quality.
The Legion 27Q-10 is a 2560x1440 IPS monitor listed at 240Hz. For a competitive game, set the intended resolution and refresh rate in the operating system, then test the picture with real game movement. Fast camera pans, dark objects over light backgrounds, and familiar target tracking are more informative than a static specification comparison.
Frame rate also matters. A monitor cannot show unique motion updates that the graphics system does not deliver. Use settings your PC can sustain in the game, then evaluate whether the screen's motion looks clear and stable at that delivery level.
Test rather than rank the headline numbers
Use a repeatable scene. A training area, scrolling test, or replay with a consistent pan lets you compare settings without game events changing the picture. Start from the monitor's normal response setting, then test one higher level. Watch for ordinary trailing, followed by overshoot or inverse ghosts.
Try the same sequence at your normal frame-rate range. Do not evaluate only a menu that runs at a fixed high rate if your actual game drops during play. If adaptive sync is enabled for compatible hardware, include it in the test because variable delivery can change how the motion feels.
The Legion's features include NVIDIA G-SYNC Compatible and AMD FreeSync Premium. These adaptive-sync capabilities are separate from the MPRT rating and from GtG behaviour. Configure them for compatible hardware, but do not use a sync label as a substitute for inspecting response artifacts.
Read a specification honestly
Marketing labels are not useless; they identify which kind of performance the manufacturer is discussing. The mistake is treating all milliseconds as a universal score. Compare MPRT with MPRT when the test context is comparable, and compare GtG with GtG while noting the selected mode and transition conditions.
For a buyer, the practical priority is simple: does the monitor provide clean motion for the games, frame rates, and connection you use? The Legion 27Q-10's verified 0.5ms MPRT figure contributes to that profile alongside its QHD 240Hz panel, but your own tested experience completes the picture.
Frequently Asked Questions
Can I compare 0.5ms MPRT directly with 1ms GtG?
No. They measure different behaviour. MPRT relates to the visibility of a moving image, while GtG measures a pixel moving between grey levels under defined conditions.
What does GtG stand for?
GtG means grey-to-grey. It is a pixel-transition measurement, and its result can vary with the shades tested and the selected response-time mode.
Does a lower response-time number always look better?
No. An aggressive response mode can create overshoot or inverse ghosting. Choose the setting that produces clean motion in the games and refresh ranges you use.
What response-time figure is listed for the Legion 27Q-10?
The verified product specification lists 0.5ms MPRT. It should be interpreted as an MPRT value, not as an unlisted GtG result.
Read each response-time label for what it measures, then let real motion decide which screen setting earns your confidence.