What is Monitor Ghosting & How to Eliminate It

Monitor ghosting is a visual trail or smudge that lingers behind moving objects on screen. It is most noticeable in fast-paced games, scrolling text, or high-contrast panning scenes.

Every time a frame changes, the liquid crystal molecules inside an LCD panel must physically rotate to modulate light. The time this takes is called the pixel response time (often measured as Gray-to-Gray or GtG).

At 144Hz, a new frame is drawn every 6.94 milliseconds. At 240Hz, every 4.17 milliseconds. If a pixel takes 10ms to transition from dark gray to light gray, the previous frame is still fading out while the new frame has already appeared, creating an optical smear.

VA (Vertical Alignment): Prone to "black smearing". While VA panels deliver high native contrast (3000:1 to 5000:1), transitions out of pure black are notoriously sluggish, often taking 20ms to 40ms.

IPS (In-Plane Switching): Fast and consistent transition speeds across most gray steps (typically 3ms to 6ms GtG with good overdrive). Minimal dark smearing.

TN (Twisted Nematic): Historically the fastest LCD technology (1ms to 2ms GtG), with minimal ghosting at the cost of poor viewing angles and low contrast.

OLED: Near-instantaneous response times (0.03ms to 0.1ms). OLED pixels are self-emissive and switch almost instantaneously, eliminating traditional LCD response time ghosting entirely.

Almost all modern gaming monitors feature an Overdrive (OD) setting in their on-screen display (OSD) menu (often labeled "Response Time", "TraceFree", or "Overdrive").

Overdrive applies a higher voltage spike to force liquid crystals to rotate faster.

Too little overdrive: Sluggish transitions, visible dark trails behind objects.

Optimal overdrive: Sharp transitions with minimal trailing.

Too much overdrive: The liquid crystal overshoots its target color, creating "inverse ghosting" (coronal halo)—a glaring bright white, cyan, or purple trail trailing behind moving edges.