Monitor Ghosting Test Online
See blurry trails behind moving objects? This UFO-style ghosting test slides blocks across dark and light backgrounds at three speeds to reveal ghosting, black smearing, and overdrive overshoot — free, in your browser.
Moving-Block Test
Slow — office scrolling
Medium — video playback
Fast — FPS gaming
Trail behind the block?
A smear or dark wake trailing the block is ghosting — slow pixel response. Worst on VA panels in dark scenes.
Bright halo ahead of it?
A bright leading edge is inverse ghosting (overshoot) — overdrive set too high. Lower it one notch.
Open the fullscreen ghosting test
A block cycles across the screen — check for trails and halos
How to Read and Fix Ghosting
Ghosting is usually a settings problem, not a broken panel. Tune your overdrive to clean it up.
1. Watch the trail
Focus behind the moving block. A long, dark wake means slow response. Test on the dark background — that's where VA-panel smearing shows worst.
2. Tune overdrive
In your monitor OSD, find Response Time / Overdrive / OD and step through Off → Low → Medium → High. Pick the highest setting with no bright leading halo.
3. Verify at speed
Re-check at the fast speed. If you mainly game, you want clean motion at high speed. Avoid "Extreme" — it usually adds overshoot.
Ghosting Terminology: GtG, MPRT, Overdrive
GtG response time
Grey-to-grey — the time for a pixel to switch shades. The advertised "1ms" is the single fastest transition; real average GtG is often 2–4× higher, and dark transitions are far slower.
MPRT
Moving Picture Response Time combines pixel response with sample-and-hold blur — a better proxy for perceived motion clarity. At 60Hz, minimum MPRT is ~16.67ms.
Overdrive (OD)
Applies extra voltage to spin liquid crystals faster, cutting ghosting. Too much causes overshoot (inverse ghosting). Start at Medium.
Inverse ghosting
Bright halos ahead of moving objects from excessive overdrive. More distracting than mild ghosting — if you see it, lower the OD level.
Ghosting by Panel Type
| Panel | Typical GtG | Ghosting |
|---|---|---|
| TN | 1–4ms | Minimal — fast, easy to tune overdrive |
| IPS / Fast IPS | 3–8ms (Fast IPS 1–3ms) | Light; Fast IPS approaches TN |
| VA | Bright 3–5ms · Dark 15–40ms | Severe in dark scenes ("VA smear") |
| OLED | <0.1ms | Virtually none — no overdrive needed |
Still Seeing Trails After Tuning?
If overdrive and refresh-rate settings don't help, severe dark-scene smearing on a VA panel can't be fully cured — it's inherent to the technology. The only real fix is a faster panel or an OLED. Make sure you're also running at your full refresh rate.
Ghosting Test FAQ
Why does my "1ms" monitor still ghost?
The advertised 1ms is the single fastest grey-to-grey transition. Other transitions can take 5–20ms, and VA panels marketed as 1ms may have 30ms+ dark transitions. Average GtG across all colors is the number that actually matters.
Should I max out the overdrive setting?
Generally no. Maximum overdrive almost always creates overshoot — bright leading halos ahead of moving objects. The middle setting is usually the best balance of clean motion without inverse ghosting.
Can VA-panel dark ghosting be fixed?
Not fundamentally. VA liquid-crystal alignment makes dark transitions inherently slow, so dark-scene smearing persists regardless of settings. Some premium VAs are better, but none match IPS or OLED.
Does a higher refresh rate reduce ghosting?
It reduces perceived motion blur by shortening frame persistence, but if pixel response can't keep up, higher refresh can actually expose more ghosting — because more color switches must complete in the same time.
Does OLED have ghosting?
Essentially none — OLED pixels respond in 0.03–0.1ms. OLED still has sample-and-hold blur like any display, which needs high refresh or black-frame insertion to fully solve, but traditional pixel ghosting is negligible.