Monitor Ghosting Test: Find the Right Overdrive Setting

The fastest response-time label in a monitor menu is not always the cleanest setting.

I published the full guide on KeyboardTester.click with the live monitor ghosting test, localized versions, FAQ schema, source links, and a practical overdrive decision table:

This Dev.to version keeps the practical workflow.

Fast answer

Open the Monitor Ghosting Test, set your monitor to the refresh rate you actually use, then compare overdrive Off, Normal, Fast, and Extreme one at a time.

Keep the lowest setting that removes the long same-color trail. If a bright, dark, or opposite-color halo appears, that is inverse ghosting or overshoot, so lower overdrive one step.

Why the fastest mode can look worse

LCD overdrive pushes pixels harder so they reach the target color faster. Push too little and you get normal ghosting: a smeared trail behind motion. Push too much and the pixel overshoots the target, creating coronas or inverse ghosting.

That is why the best setting is often Normal or Medium, not Extreme.

What to look for

Symptom	Likely cause	Change
Same-color trail behind motion	Pixel response is too slow	Raise overdrive one step
Bright, dark, or opposite-color halo	Overdrive overshoot	Lower overdrive one step
Black smear in dark scenes	VA dark-to-dark response limit	Try Normal overdrive, higher Hz, or accept panel limit
Motion jumps instead of smears	Frame pacing or frame skipping	Run a frame skipping test before changing overdrive

Simple test workflow

Confirm the refresh rate with a Refresh Rate Test.
Open the Monitor Ghosting Test.
Start with overdrive Off or Low.
Try Normal, Fast, and Extreme one at a time.
Stop at the highest mode that reduces the trail without halos.
Recheck the same setting in a real game or scrolling workload.

When it is not ghosting

If the object jumps forward instead of leaving a blur trail, you may be seeing dropped frames or physical frame skipping. Compare with the Frame Skipping Test and the frame skipping guide.