What Is DLSS and How It Boosts FPS on RTX Cards

5 min read

DLSS, short for Deep Learning Super Sampling, is Nvidia technology that uses artificial intelligence to raise frame rates on RTX graphics cards. Instead of rendering every pixel at full resolution, the card renders a smaller image and uses AI to rebuild it at full resolution. The result looks close to native rendering while running much faster.

DLSS has become one of the most important graphics features of recent years, and it now appears in hundreds of games. This guide explains how DLSS works, what its modes do, and how to get the best results from it.

How DLSS Works

A game rendered at full resolution calculates the color of every pixel on screen. At 4K, that is over eight million pixels per frame, and the work grows with resolution. DLSS cuts that work by rendering the game at a lower resolution, often 1080p for a 4K output, and then rebuilding the full image. DLSS boosts FPS by rendering fewer pixels and rebuilding the picture with AI.

The rebuild is done by a neural network running on the Tensor cores of an RTX card. Tensor cores are specialized units built for AI math, and they are separate from the cores that render the game.

DLSS uses motion vectors and data from previous frames to improve the result. The game tells DLSS how objects moved between frames, and DLSS uses that history to place details correctly.

The whole process happens in milliseconds. The game renders a smaller frame, DLSS rebuilds it, and the finished frame reaches the screen with only a small delay. The time saved on rendering far outweighs the time spent on rebuilding, which is why frame rates rise.

DLSS Quality Modes Explained

Quality mode renders at about two-thirds of the output resolution and gives the sharpest DLSS image. At 4K output, Quality mode renders near 1440p.

Balanced mode renders at about 58 percent of the output resolution. It trades a little sharpness for a bigger frame rate gain. On a mid-range card, Balanced mode often delivers the best mix of speed and image quality, especially at 1440p.

Performance mode renders at half the output resolution and gives the largest frame rate gain. At 4K output, Performance mode renders at 1080p.

Ultra Performance mode renders at one-third of the output resolution and is meant for 8K gaming. It is too soft for most players at 4K, but at 8K it is the only way to reach playable frame rates. Use it only when the output resolution is very high.

DLSS Frame Generation

Frame Generation, part of newer DLSS versions, creates entirely new frames between rendered frames. The card renders two real frames, and the AI builds an intermediate frame between them.

Frame Generation raises the displayed frame rate without raising the game simulation rate. The game still updates its logic at the original rate, so the smoothness is visual, not interactive.

The extra frames add a small amount of latency. DLSS pairs Frame Generation with Nvidia Reflex, which reduces input delay and keeps controls feeling responsive. Turn Reflex on whenever you use Frame Generation, because the combination feels far better than Frame Generation alone.

Frame Generation needs an RTX 40 series or newer card. Older RTX cards support DLSS upscaling but not Frame Generation, because the optical flow hardware in newer cards does the frame building. Check your card generation before looking for the setting in a game.

DLSS Ray Reconstruction and Settings

Ray Reconstruction improves ray-traced lighting in games that support it. Ray tracing produces noisy images that need denoising, and the old denoiser blurred fine detail.

Turn on DLSS in the game graphics settings, usually under a section called upscaling or Nvidia features. Pick Quality mode first, play for a few minutes, and compare it to native rendering.

Use the Nvidia app or GeForce Experience to check which games support DLSS. The app lists supported titles and can apply recommended settings. Some games also let you update the DLSS version through the app, which can improve quality in older titles.

Combine DLSS with the right display settings. A high refresh rate monitor shows the extra frames, while a 60 hertz monitor caps the visible benefit at 60. If your monitor is 60 hertz, favor Quality mode for the sharpest image, since extra frames above 60 go unseen.

When DLSS Is Worth Using

DLSS is most valuable at high resolutions. At 4K, the performance gain is large and the image quality loss is hard to see. At 1080p, the gain is smaller and the softness is more visible, because the starting resolution is already low.

Ray-traced games benefit most, because ray tracing is extremely demanding. A game that runs at 30 frames with ray tracing at native resolution can reach 60 or more with DLSS Quality. Ray tracing plus DLSS is the combination Nvidia designed the technology for.

Competitive games are a mixed case. The extra frames help smoothness, but the added latency from Frame Generation can hurt aim. For competitive titles, use DLSS upscaling without Frame Generation, and keep the latency as low as possible.

If your card already runs a game well above your monitor refresh rate, DLSS adds nothing visible. Turn it off and enjoy the native image. DLSS is a tool for reaching playable frame rates, not a setting to enable blindly in every game.

The best way to learn nvidia-rtx is to keep going. Your next read is right below: RTX Video Super Resolution: Is It Worth Enabling.

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