FSR - FidelityFX Super Resolution

FSR can be used to get better performance in games at the cost of visuals. It is comparable with DLSS, but can be applied to every game. There are several modes from ultra quality to maximum performance. For example, it is possible to double your FPS with very little visual loss. FSR only works if the game is GPU limited (your GPU runs at 100%).

Note that the image degradation is noticeable. Full HD + ultra high graphics + FSR might not be worth it. However FHD + low settings + FSR with 60 FPS might be significantly better than having 30 FPS with the same settings and no FSR. The performance difference might be even bigger if your VRAM is not big enough. The image degradation is not as noticeable with high resolution, so 4k ultra high + FSR might fit your needs.

Setup with Wine

Basic setup

• Set WINE_FULLSCREEN_FSR=1 as environment variable, or use the switch in Lutris/Bottles

• In game set your setting according to the table on page 10 of this document: For example, if you want to have Ultra Quality, and your output resolution (the resolution of your actualy monitor) is 1920x1080, you set your ingame resolution to 1477x831. Other resolutions also work, but you might get black bars if the aspect ratio is not your monitor's native one. Setting your ingame resolution to your output resolution disables FSR.
• In game
  • Enable anti aliasing (TAA, MSAA, FXAA, ...)
  • Disable effects that generate noise (like Motion Blur, Blur, Chromatic Aberration, Sharpening, etc.)
• You need a patched version of Wine or Proton, for example the TKG, or GE version. Default versions in Lutris and Bottles work fine.

More configuration options

You can add more options with environment variables:

• WINE_FULLSCREEN_FSR_STRENGTH=4

This sharpens the image. 4 is an example value. 0 is maximum sharpness, higher values mean less sharpening. 5 is the maximum value. The default is 2 but this is probably too much for your game. Just experiment with different values.

• WINE_VULKAN_NEGATIVE_MIP_BIAS=45

This results in textures with higher resolution. 45 is an example value. AMD recommends:

Quality Setting	MIP Bias
Ultra Quality	38
Quality	58
Balanced	79
Performance	100

• WINE_VULKAN_BIAS_ALL_SAMPLER=1

This applies the MIP Bias to everything. 1 is enabled, 0 is disabled. This can result in weird game behaviour.

Examples

• Witcher 3

Setup with Gamescope

You can enable FSR in Gamescope with gamescope -U --fsr-sharpness 4 -- as command prefix. 4 is an example value, replace it by something between 0 (max) and 20 (min). This also works for native games.

Setup on the Steam Deck

To upscale a game with FSR, press the quick access button "…" (it will pause the game). Head over to the "Performance" tab, set "Performance Overlay Level" to "5" and turn on "Use per-game profile" (you’ll see a FSR indicator at "3" and will show if FSR is on or not). Then, head down and set "Scaling Filter" to "FSR" and adjust "FSR Sharpness". FSR might still be off depending on the game you play, as it only turns on when your resolution is lower than the native resolution of the Steam Deck (1280x800). So, you will need to lower the in-game resolution until it shows as enabled.

If the game doesn’t offer a way to change the in-game resolution, you can still force it. Press the quick access button "…" again, select "Properties" then scroll down and change the "Game Resolution" to something lower than 1280x800. You may need to fiddle around with the resolution until the Steam Deck automatically upscales the image.

FSR 2

FSR 2 provides far better graphics quality than FSR 1. However, it needs support from the game. You can often use a mod to translate DLSS to FSR 2 if the game only supports DLSS.