How to Fix Black Bars on Your Monitor

Black bars around the edges of your screen (also called underscan) are a super common issue on NVIDIA GPUs, especially in multi-monitor setups like yours (2560x1440 main + 1920x1080 secondary). Even if the resolution is set correctly to the monitor’s native 2560x1440, the GPU or monitor can apply the wrong scaling. Windows Display settings and the NVIDIA Control Panel often need tweaking together. The good news: this is almost always fixed in 2–5 minutes with the exact steps below.

Follow them in order. Most people solve it at Step 2.

Step 1: Quick Windows Display Settings Check (Rule Out Basics)

Right-click your desktop → Display settings.

• Under Scale & layout, set Scale to 100% (Recommended).

• Under Display resolution, make sure the 2560x1440 monitor is set to 2560 x 1440 (Recommended).

• Under Multiple displays, choose Extend these displays (not Duplicate).

• Identify which monitor is which (click Identify) and set your 2560x1440 as the main one if it isn’t already.

Apply changes and test. If black bars remain, move on.

Step 2: Fix It in NVIDIA Control Panel (The #1 Fix for 90% of Cases)

Right-click desktop → NVIDIA Control Panel (or search for it in Windows).

1. In the left pane, click Display → Adjust desktop size and position.

2. At the top, select your 2560x1440 monitor (it shows as a numbered icon – click Identify if unsure; ignore the 1080p one for now).

3. Under Apply the following settings:

• Select a scaling mode: Choose Full-screen (not Aspect ratio or No scaling).

• Perform scaling on: Choose GPU.

• Check the box Override the scaling mode set by games and programs.

4. Click Apply. The screen should instantly stretch to the edges.

This forces the NVIDIA GPU to handle scaling instead of the monitor or Windows, which fixes underscan/black bars. If you still see bars, try the Size tab (next to Scaling) and drag the sliders or enable desktop resizing to stretch manually.

Step 3: Check Your Monitor’s Built-in Menu (OSD)

Many monitors add their own overscan even when the PC is correct.

• Press the physical buttons on your 2560x1440 monitor to open the on-screen menu.

• Look for Picture, Image, Aspect Ratio, Screen Size, HD Size, or Overscan.

• Set it to Full, Wide, 1:1 (disable), or Auto (avoid “Aspect” or “16:9” if it forces bars).

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Save/exit the menu and test.

Step 4: Extra Tips for Dual-Monitor Setups & Persistent Issues

• Your second 1080p monitor can sometimes interfere with scaling on the main one. Temporarily disconnect it, apply the NVIDIA fix, then reconnect.

• Update your NVIDIA drivers: Open GeForce Experience or download the latest Game Ready Driver from nvidia.com. Clean install if possible.

• Cable matters: Try a different HDMI/DisplayPort cable or port. DisplayPort is often more reliable than HDMI for high-res monitors.

• If using HDMI on a TV-style monitor, the above GPU scaling usually overrides any TV overscan.

Quick Test After Changes

• Desktop should now fill the entire screen with no bars.

• Open a full-screen app or game to confirm.

• If bars only appear in games, the “Override” checkbox in Step 2 fixes that too.

This exact combination (Full-screen + GPU scaling + monitor aspect set to Full) resolves the issue for the vast majority of users with your exact symptoms.

If it still doesn’t work after all steps (very rare), reply with your exact monitor model, cable type (HDMI/DP), and a photo of the black bars – happy to give model-specific tweaks! Your screen should be perfectly filled now. 🚀