1ms Response Time Monitor Test
A 1ms response time monitor test verifies that your display is actually delivering the near-instant pixel switching speed its spec sheet claims. '1 ms' is the most common gaming monitor marketing claim, but the spec is measured under ideal conditions — typically a single grey-to-grey transition using the fastest overdrive setting available. Real-world performance varies by overdrive preset, transition colour, and ambient panel temperature. A panel measuring 1 ms GtG on the fastest overdrive may produce inverse ghosting (a bright halo ahead of moving objects) that makes motion look worse, not better. The practical question is not whether your panel can hit 1 ms in a lab, but whether it delivers clean motion at your preferred overdrive setting in actual gaming conditions. This test uses four movement speeds to expose response behaviour across the full range of gaming scenarios — from 60 fps slow motion (240 px/s) to 360 fps extreme velocity (1,920 px/s). Use it to validate your 1 ms rating and find the overdrive preset that maximises speed without introducing inverse ghosting artefacts.
Panel / Response Type
Monitor Ghosting Test
Watch the moving block and rate the ghosting you see
Speed
Typical fast-paced game movement
Press Start to begin the test
Monitor Response Time Reference
| Response Time | Rating | Typical Panel |
|---|---|---|
| < 0.1 ms | Elite 🏆 | OLED (self-emissive) |
| 0.1–1 ms | Excellent ✅ | TN at Fastest / Premium IPS OD |
| 1–4 ms | Good ⚡ | Gaming IPS / Fast VA |
| 4–8 ms | Average 📊 | Standard IPS, mid-range VA |
| 8–16 ms | Below avg 💪 | Budget VA / older TN |
| > 16 ms | Slow 🐢 | Office IPS / uncorrected VA |
Is 1ms Response Time Actually Noticeable in Gaming?
| Response Time | Tier |
|---|---|
| < 0.1 ms | OLED Elite |
| 1 ms | Pro Gaming |
| 2–4 ms | Gaming |
| 4–8 ms | Everyday |
| 8–16 ms | Sluggish |
| > 16 ms | Poor |
Frequently Asked Questions
Is 1ms response time actually noticeable vs 4ms?
It depends on refresh rate. At 144 Hz (6.9 ms per frame): 1 ms vs 4 ms is barely noticeable — both resolve within the frame. At 240 Hz (4.2 ms per frame): 1 ms is clean; 4 ms occupies 95% of the frame, producing visible ghosting in fast-paced scenes. At 360 Hz (2.8 ms per frame): 1 ms is required for clean motion; 4 ms produces significant ghosting. The 1 ms spec matters most at 240 Hz and above.
What is the difference between GtG and MPRT?
GtG (Grey-to-Grey) measures how long a pixel takes to transition from one grey shade to another — this is the traditional pixel response spec. MPRT (Moving Picture Response Time) measures how long a pixel appears illuminated per frame, which affects motion blur perception. MPRT is influenced by backlight persistence and can be reduced with Black Frame Insertion (BFI). MPRT is typically 1–3× lower than GtG on monitors with BFI enabled. When a monitor says '1 ms MPRT', it usually means 1 ms with BFI active, while GtG may be 4–8 ms. Always check which spec is quoted.
Why does my 1ms monitor still have ghosting?
Likely causes: (1) You're using overdrive on 'Off' or 'Low' — the 1 ms spec requires overdrive to be enabled. (2) The 1 ms spec was measured on fastest overdrive, which may produce inverse ghosting worse than the original ghosting. (3) Your panel uses dark-scene-to-dark-scene transitions that are 3–5× slower than the GtG spec. (4) The monitor isn't running at its rated refresh rate — check Display Settings. Run this test on each overdrive preset to find the cleanest motion setting.
Does 1ms response time reduce input lag?
No. Response time (GtG) is purely about pixel colour transition speed — it does not affect input lag. Input lag is determined by the display controller, post-processing pipeline, and signal processing time from GPU to screen. A monitor with 1 ms GtG can have 10 ms input lag or 2 ms input lag depending on its electronics. Input lag is measured separately (with a hardware photodiode + high-speed camera) and is not advertised alongside GtG on most spec sheets. Gaming-mode buttons on monitors typically reduce input lag by disabling image processing.
What panels achieve a true 1ms GtG response time?
Three panel technologies achieve 1 ms GtG: (1) TN — inherently fast, reaches 1 ms without aggressive overdrive. (2) Fast IPS — achieves 1 ms with advanced overdrive; available since 2020 on LG Nano IPS and similar panels. (3) OLED — achieves 0.01–0.03 ms, far exceeding the 1 ms target. VA panels rarely achieve a true 1 ms GtG on dark transitions despite marketing claims of 1 ms MPRT. Always look for 'GtG' in the spec, not 'MPRT', when comparing response times.
How do I verify my monitor's 1ms rating at home?
Use this test: run the tool at 'Extreme' speed (1,920 px/s). On a true 1 ms panel, you should see minimal to no trailing behind the moving block. If clear ghosting is visible at Normal speed (480 px/s), your panel is not performing at its rated spec or overdrive is disabled. Note: this is a subjective visual test, not hardware measurement. For precise GtG measurement, you would need a photo sensor + oscilloscope setup used by professional monitor reviewers.
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