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4:3 Stretched vs 16:9

Everyone describes what 4:3 stretched does. This shows it: the same screenshot in all three modes, untouched — and what each one costs you in field of view and pixels.

Everything on screen is wider by
0%
Horizontal field of view
106°
Visible to your left and right
100%

Pixel cost

The four 4:3 resolutions, against 1080p

ResolutionPixelsvs 1920×1080Character
1024 × 7680.79 M-62%Maximum frames, visibly soft
1280 × 9601.23 M-41%The professional default
1280 × 10241.31 M-37%5:4 — stretches more than 4:3
1440 × 10801.56 M-25%Sharpest of the four
1920 × 10802.07 MNative 16:9, the reference

Fewer pixels means more frames only where the graphics card is the limit. CS2 is unusually CPU-bound, so check your GPU load during a real round before assuming the gain applies to you.

The arithmetic

Where 33% and 16 degrees come from

Neither figure is folklore. A 16:9 aspect ratio is 1.778 and a 4:3 one is 1.333. Squeezing the second into the first multiplies every horizontal dimension by 1.778 ÷ 1.333 = 1.333, so a player model is exactly a third wider. That is the entire appeal.

The field of view follows from the same ratio in the other direction. CS2 fixes the vertical field of view, so the horizontal one is whatever the aspect ratio makes it: about 106° at 16:9 and 90° at 4:3. You keep the full height and lose a quarter of the width — the far edges, which is where an opponent is when they start to swing wide.

Toggle between the three modes above and watch the left and right of the frame. Everything that disappears is what you are trading for the wider models.

What the simulation does

The screenshot is a 16:9 capture. Rendering at 4:3 shows the central 75% of it, so that is what the page crops to — then either centres it with black bars, or scales it back to full width, which is what GPU scaling does. Nothing is added to the image: what widens is the map's own geometry, the arches and crates and doorways, by the same third a player model does.

What it cannot show is motion. On 4:3 a target crosses your screen 33% faster in screen terms for the same real speed, and that is the part that takes days to recalibrate, not the part you can see in a still.

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Related

FAQ

Common questions

How much wider are player models on 4:3 stretched?

Exactly 33%. A 16:9 aspect ratio is 1.778 and 4:3 is 1.333; stretching one into the other multiplies every horizontal dimension by 1.778 divided by 1.333, which is 1.333. Hitboxes are unchanged — only what you see is wider.

How much field of view do you lose on 4:3?

About 16 degrees. CS2 fixes the vertical field of view, so the horizontal one follows the aspect ratio: roughly 106 degrees at 16:9 and 90 degrees at 4:3. In practice you lose the far left and right edges of the screen, which is where an opponent appears as they begin to swing wide.

Does 4:3 stretched give more FPS?

It renders fewer pixels, so yes if your graphics card is the limit. 1280x960 is 1.23 million pixels against 2.07 million at 1920x1080, which is 41% fewer. CS2 is unusually CPU-bound, so on a system where the GPU is already coasting the gain is small.

Why do black bars appear when I set 4:3?

Because the GPU is not stretching the image. The game renders a narrower picture and the driver leaves it centred. Turn on full-screen GPU scaling in the Nvidia or AMD panel, and make sure CS2 runs in exclusive Fullscreen rather than Windowed Fullscreen.

Is 1280x960 or 1024x768 better?

Both are 4:3, so both stretch identically and both lose the same field of view. The difference is sharpness against frames: 1024x768 renders 36% fewer pixels than 1280x960 and looks visibly softer at range. 1280x960 is what the professional field settled on.