Monitor Ghosting: What It Is, What Causes It, and How to Fix It

What Is Monitor Ghosting?

Monitor ghosting is a visual artifact where a faint trail or shadow follows a moving object on screen. The "ghost" is the previous position of the object, still visible for a brief moment because the display pixels could not change color fast enough to keep up with the motion. Ghosting is most noticeable in fast-paced games, sports streams, and any content with rapid movement against a contrasting background.

What Causes Ghosting?

The root cause is pixel response time — the time it takes for a single pixel to transition from one color to another, measured in milliseconds (ms). When a pixel changes slowly, the old color lingers on screen while the new image has already moved on, creating the ghost trail.

Response time is affected by:

  • Panel technology: TN panels are fastest (1–5 ms), IPS panels are in the middle (4–10 ms), and VA panels are typically the slowest at transitions between dark and mid-tones (5–20 ms).
  • Temperature: Cold LCD panels respond more slowly. Ghosting may be worse when the monitor first turns on.
  • Overdrive settings: Most monitors include an overdrive feature that applies extra voltage to speed up pixel transitions. Too little overdrive causes ghosting; too much causes inverse ghosting.

Ghosting vs Inverse Ghosting vs Motion Blur

These three artifacts are often confused:

  • Ghosting: A dark trail behind a moving object. Pixels are too slow to follow the motion.
  • Inverse ghosting (overshoot): A bright halo in front of a moving object. Overdrive pushed the pixel too far in the opposite direction.
  • Motion blur: A general smearing of moving objects caused by the persistence of each frame on screen during the refresh interval. More pronounced at low refresh rates (60 Hz) than at high refresh rates (144 Hz+).

How to Test Your Monitor for Ghosting

Our free Ghosting Test tool moves a white box across a black background. Watch the box carefully:

  • A dark smear or trail behind the box = classic ghosting.
  • A bright halo in front of the box = inverse ghosting (overdrive too aggressive).
  • No visible trail at any speed = your panel has excellent response time.

Test at multiple speeds. Ghosting is often only noticeable at fast and very fast movement speeds.

How to Reduce Monitor Ghosting

1. Adjust Overdrive

Most monitors have an overdrive setting in their On-Screen Display (OSD) menu, labeled as Response Time, AMA (BenQ), TraceFree (ASUS), or similar. Start at the medium setting and check the ghosting test at each level:

  • If you see dark trails → increase overdrive.
  • If you see bright halos in front of the moving object → decrease overdrive.
  • Find the setting where neither artifact is visible at your typical gaming speed.

2. Increase Refresh Rate

A higher refresh rate (144 Hz, 165 Hz, 240 Hz) reduces motion blur because each frame is displayed for a shorter time. This does not eliminate ghosting from slow pixels, but it makes it less noticeable. Ensure your GPU is actually outputting the full refresh rate in your OS display settings.

3. Enable Motion Blur Reduction

Features like ULMB (NVIDIA), MBR (ASUS), DyAC (BenQ), and ELMB (ASUS) strobe the backlight in sync with the display refresh, drastically reducing perceived motion blur. Trade-off: screen brightness is reduced by 50–70%, and these modes typically disable Variable Refresh Rate (G-Sync / FreeSync).

4. Consider a Different Panel

If ghosting is a priority and you use a VA panel, consider that VA panels are inherently prone to "black smearing" — slow transitions from very dark colors. TN panels have the fastest response times but poor color and viewing angles. IPS panels offer the best balance for most users.

Summary

  • Ghosting is caused by pixels transitioning too slowly between colors.
  • Test your monitor with our free Ghosting Test tool.
  • Adjust overdrive in your monitor OSD to find the sweet spot.
  • Higher refresh rates reduce motion blur but do not cure slow pixels.
  • VA panels are most prone to dark-scene ghosting; TN panels are the fastest.
Published on: May 3, 2026