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CS2 resolution, aspect ratio and stretching: how it works

What Valve changed for resolution and aspect ratio in fullscreen windowed mode, why black bars or a stretched image appear, and how scaling settings differ.

By CSgoFriendsPublished Last checked

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Illustration: CounterStrikeGO

Counter-Strike 2 lets you change the rendering resolution and aspect ratio in fullscreen windowed mode. Valve added that in its Aug. 14, 2025, update and fixed two related bugs four days later. Whether you see black bars or a stretched picture depends on the resolution you pick, your monitor’s native resolution and how the image gets scaled.

This guide explains what Valve changed, what the terms mean and what the scaling options in the NVIDIA Control Panel do. Valve’s Sept. 23, 2026, notes add that the new crosshair system also rescales automatically when the display resolution changes.

What Valve changed for fullscreen windowed mode

Valve wrote in the Aug. 14, 2025, patch notes: “Rendering resolution and aspect ratio can now be changed in fullscreen windowed mode.” The same update listed rendering performance improvements across most maps.

The Aug. 18, 2025, update fixed two problems with that feature. Valve wrote that it fixed “a case where fullscreen windowed mode wasn’t offering resolutions with extreme aspect ratios” and “a case where fullscreen windowed mode wasn’t actually stretching to fill the screen.”

Resolution, aspect ratio and native resolution

Three terms explain stretched or boxed images.

  • Resolutionis the number of pixels on the screen. Steam Support describes it as one part of a display mode, alongside the refresh rate.
  • Aspect ratiois the proportion of width to height, written as a pair of numbers such as 4:3, 16:10 or 16:9. Wikipedia lists 5:4, 4:3, 16:10 and 16:9 as common display aspect ratios, past and present.
  • Native resolutionis the single fixed resolution of an LCD or other flat panel.

Wikipedia says that as of 2016 most computer monitors use 16:9. It also reports that in 2021 a resolution of 1920x1080 was used by two thirds of Steam users for their primary display.

Why lower resolutions look softer on an LCD

An LCD cannot change its resolution the way a cathode-ray tube (CRT) monitor can. Wikipedia explains that an LCD has to scale a smaller image up to fit its native resolution, and the image loses sharpness when it is enlarged. Optimal quality is reached only when the signal matches the native resolution.

Resolutions that are exact multiples can work better in theory. Wikipedia gives the example of an 800x600 image on a 1600x1200 LCD, where each source pixel could be shown as a block of four. In practice, it says, most monitors apply a smoothing algorithm to all smaller resolutions, so quality still suffers.

Some widescreen LCD monitors can show a lower resolution without scaling or stretching it. The image stays sharp but does not fill the panel, and black edges appear on either side.

Why you get black bars or a stretched image

When the aspect ratio of the image differs from that of the screen, something has to give. Wikipedia describes three outcomes for narrower content on a widescreen display:

  • Black bars on the left and right, called pillarboxing.
  • Cropping of the top and bottom.
  • Stretching to fill the screen, which Wikipedia says is often considered ugly because it severely distorts everything on screen.

Wikipedia also says that 16:9 video games are letterboxed on a 16:10 or 4:3 display or have a reduced field of view. This is a general statement about games, not about CS2 in particular.

Scaling modes in the NVIDIA Control Panel

If you have an NVIDIA graphics card, the driver has its own scaling controls on the Adjust Desktop Size and Position page. NVIDIA says the available tabs depend on the display type, and that scaling controls “let you adjust the size of the desktop to best fit your screen.”

Scaling mode What NVIDIA says it does Trade-off
Aspect ratio Expands the image as much as possible while keeping its proportions May leave black borders, but avoids distortion
Full-screen Stretches the image to fill the entire display Fills the screen; proportions may not be kept
No scaling Leaves the image at its original size and centers it Small but crisp; a black border may appear
Integer scaling Duplicates pixels at the maximum possible integer factor, horizontally and vertically GPU scaling only; NVIDIA Turing and later GPUs only

Integer scaling applies to resolutions smaller than the native one. The page also offers a choice of where scaling happens:

  • GPUthe graphics card scales the image from the set resolution up to the native resolution timing.
  • Automatica combination of display and GPU scaling does the job.

A Preview section on the same page shows how full-screen applications will look with the selected scaling configuration and resolution.

Refresh rate in fullscreen windowed mode

Steam Support says that in windowed or fullscreen windowed mode, the refresh rate is determined by your system’s display settings, not by the game. For example, on Windows 10 it can be found in “Advanced display settings.” Steam Support says you might own a high refresh rate display without running it at its highest refresh rate.

Steam Support also warns that on some systems NVIDIA G-Sync can introduce visual glitches when playing non-fullscreen windowed. After changing G-Sync or AMD FreeSync settings, you need to restart CS2.

What happens to your crosshair when the resolution changes

Valve’s Sept. 23, 2026, notes describe the new crosshair system. Thickness and length are now measured in pixels. In the past, values used an arbitrary scale that was converted to pixels based on display resolution, so the same value gave different pixel counts at different resolutions.

The new system also rescales pixel counts automatically when the display resolution changes. Valve gave this example: a crosshair configured at 1280x720 with a thickness of 2 pixels becomes 4 pixels at 2560x1440, so it stays proportionally the same.

FAQ

Can I change resolution and aspect ratio in fullscreen windowed mode in CS2?

Yes. Valve added this in its Aug. 14, 2025, update. An Aug. 18, 2025, update fixed cases where extreme aspect ratios were missing and where the image was not stretching to fill the screen.

Why do I see black bars on the sides of the screen?

Black bars appear when the image has a narrower aspect ratio than the display. Wikipedia calls this pillarboxing. NVIDIA’s Aspect ratio and No scaling modes can also leave black borders, while its Full-screen mode stretches the image to fill the display.

Does running a lower resolution make the image blurry?

On an LCD it can. Wikipedia says the monitor has to scale a smaller image up to its native resolution, which loses sharpness. Some monitors can show lower resolutions without scaling, but then the image does not fill the screen.

Does my crosshair change size when I change resolution?

With the new crosshair system, it rescales automatically so it stays proportionally the same. Valve’s example is a 2-pixel thickness at 1280x720 becoming 4 pixels at 2560x1440.

Where do I set the refresh rate for fullscreen windowed mode?

In your system’s display settings. Steam Support says that in windowed and fullscreen windowed mode the refresh rate is determined there.

Can NVIDIA’s driver settings override what I choose in the game?

Per NVIDIA’s page, yes, if the override check box is checked on the Adjust Desktop Size and Position page. Applications then cannot change the scaling mode set there.

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