Quick Answer: Overscan is a GPU display setting, not a broken monitor — the edges of your desktop get cut off (or shrink with black bars, called underscan) because your graphics card or the monitor’s HDMI input is treating the signal like a TV feed instead of a native PC signal. Fix it in under a minute in NVIDIA Control Panel’s “Adjust Desktop Size and Position,” AMD Radeon Software’s HDMI Scaling slider, or Intel Graphics Command Center’s Scale setting, or sidestep it entirely by switching the cable to DisplayPort. Trying a different refresh rate close to the monitor’s native rate also frequently clears it without touching a single scaling setting.
If you’ve ever plugged a monitor into a new GPU, laptop, or mini PC over HDMI and watched the taskbar disappear off the bottom edge, or seen the whole desktop shrink into a smaller rectangle with black bars around it, you’ve hit overscan (or its mirror image, underscan). Neither is a hardware defect, and neither requires a return or exchange — both come from a scaling mismatch that’s fixed entirely in software, most of the time in one control panel.
Overscan vs. underscan at a glance
| Symptom | What's happening | Where to fix it |
|---|---|---|
| Taskbar, window edges, or cursor near the border get clipped | Overscan — the rendered image is larger than the visible screen | GPU scaling setting, described below |
| Desktop is smaller than the screen with black bars around it | Underscan — the rendered image is smaller than the visible screen | Same scaling setting, opposite direction on the slider |
| Only happens over HDMI, not DisplayPort | The display is identifying itself as a TV rather than a PC monitor | Switch to DisplayPort, or force "PC" mode in the driver |
| Started after a refresh-rate change | The new refresh rate reset the display's assumed timing metadata | Reselect your monitor's native refresh rate |
| Happens in BIOS/boot screen but not in Windows | Firmware-level scan setting, separate from the OS driver setting | Check the display's own on-screen menu for an "Aspect"/"Just Scan" option |
Why this happens: monitors inheriting a TV problem
Overscan is a holdover from analog broadcast television, where TVs intentionally cropped a few percent off every edge of the picture to hide sync noise and broadcast artifacts that lived just outside the visible frame. Modern HDMI carries that same behavior forward: when a display identifies itself to a GPU as a television-type device rather than a computer monitor, the graphics driver can apply that same edge-crop or a scaling adjustment by default, even though there’s no broadcast noise to hide on a PC’s digital output. DisplayPort was designed purely as a computer-display standard and never inherited this behavior, which is why overscan concentrates almost entirely on HDMI connections between PCs and TV-style displays.
How to fix it by GPU
NVIDIA: Right-click the desktop, open NVIDIA Control Panel > Display > Adjust Desktop Size and Position, select the Scaling tab, and check Enable desktop resizing. Four corner-and-edge handles appear directly on your desktop — drag them until the image fills the screen exactly, with no clipped or floating edge.
AMD: Open Radeon Software, click the settings gear, then Display, and find the HDMI Scaling slider. Per AMD’s own support documentation, this slider defaults to 0% (pixel-for-pixel, no scaling) and moves in either direction to shrink or expand the image until it matches your screen exactly.
Intel: Open Intel Graphics Command Center, go to Display, and adjust the Scale setting — the built-in Maintain Display Scaling and custom-scaling options work the same way as NVIDIA’s and AMD’s sliders, matching the rendered image to the panel’s visible area.
If none of those sliders fully resolves it, check the monitor’s own on-screen menu (accessed with its physical buttons) for an option often labeled “Just Scan,” “Screen Fit,” or “Aspect Ratio: Full” — some displays apply their own scan-cropping at the firmware level, independent of whatever the GPU is sending.
The fastest permanent fix: skip HDMI’s TV handshake
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- Useful when the monitor's only input is HDMI and switching to DisplayPort isn't an option, so the GPU-side scaling sliders above are the primary fix.
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If the monitor has a DisplayPort input at all, using it instead of HDMI is the cleanest permanent fix: DisplayPort was built as a PC-native standard from the start and doesn’t carry the TV-signal-type flags that trigger overscan in the first place, so the problem doesn’t come back after a driver update or GPU swap the way an HDMI scaling workaround sometimes does. Our DisplayPort vs. HDMI guide breaks down which ports actually matter for a monitor purchase, and our best monitor cables picks cover certified options for both standards.
Overscan by the numbers
- 0% default. AMD’s Radeon Software HDMI Scaling slider ships at 0% — pixel-for-pixel, no cropping — per AMD’s own support documentation, meaning overscan on an AMD system is almost always something the display or driver introduced after connection, not a factory default you’re fighting.
- 59-60Hz. The refresh rate most commonly flagged internally as TV timing on displays that also accept a native rate above 100Hz; switching to the monitor’s actual rated refresh rate (144Hz, 165Hz, and similar) frequently forces the GPU to send PC display timing metadata instead, clearing overscan as a side effect of an unrelated setting change.
The bottom line
Overscan and underscan are scaling settings, not hardware faults, and every current GPU has a one-minute fix: NVIDIA’s Adjust Desktop Size and Position corner handles, AMD’s HDMI Scaling slider, or Intel’s Scale setting under Display. If a monitor has a DisplayPort input, using it instead of HDMI removes the TV-signal handshake that causes overscan in the first place, which is the more durable fix if you’re setting up a permanent desk rather than patching a one-time connection. Still chasing a display problem rather than a scaling one? Our monitor flickering guide covers signal-integrity symptoms that look similar but aren’t, our monitor refresh rate guide explains how refresh rate and display timing interact more broadly, and our second monitor not detected guide covers the related family of multi-display connection issues.