Monitor Ghosting Test: How to Check Motion Blur

Monitor ghosting appears as a trail behind a moving object. It is usually caused by slow pixel transitions, an unsuitable overdrive setting, or a mismatch between refresh rate and frame delivery. A quick motion check can show whether a display is behaving normally.

How to check for ghosting

Set the monitor to its native resolution and maximum supported refresh rate. Use a consistent motion test with a dark object on a light background, then repeat with a light object on a dark background. Watch the moving edge rather than the center of the object.

Ghosting vs inverse ghosting

Normal ghosting leaves a dark or light trail because a pixel changes too slowly. Inverse ghosting, also called overshoot, creates a bright halo or colored outline when the monitor's overdrive is set too aggressively. Reduce the response-time or overdrive setting one step and compare again.

Check refresh rate first

A monitor running at 60Hz can feel much less responsive than the same panel at 144Hz. Run the refresh rate test before judging motion clarity. Also check that the game's FPS is not fluctuating heavily around the refresh rate.

What a browser test can and cannot show

Browser motion tests are useful for spotting visible trails, refresh-rate mismatches, and obvious frame pacing problems. They do not measure the panel's manufacturer response-time number in a lab, and they cannot fully reproduce every game engine or adaptive-sync mode.

For a fair comparison, keep the same brightness, overdrive setting, refresh rate, viewing distance, and test pattern. Compare several settings instead of relying on a single screenshot.