Interesting article, going over DLSS (on Proton only for now) and AMD vs Nvidia drivers, plus DLSS options in the works for AMD. Dem frame rates!
Follow up…
NVIDIA DLSS for Proton + Linux with DirectX 11 / 12 lands in September
NVIDIA announced today an expansion of RTX and DLSS for plenty of Windows games, and for Linux users there’s something exciting coming too: NVIDIA will hook up DLSS with DirectX 11 and 12 with Proton in September.
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Proton 6.3-6 released and adds support for;
The following games are now playable:
Tokyo Xanadu eX+
Sonic Adventure 2
Rez Infinite
Elite Dangerous
Blood of Steel
Homeworld Remastered Collection
Star Wars Knights of the Old Republic
Guardians VR
3D Aim Trainer
Improve non-English experience in Cyberpunk 2077 and Rockstar Games launchers.
Improve launcher behavior in Swords of Legends Online.
Improve video playback in Deep Rock Galactic, The Medium, Nier: Replicant, and Contra: Rogue Corps.
Add optional support for Nvidia’s NVAPI GPU support library and DLSS. It is disabled by default and can be enabled with PROTON_ENABLE_NVAPI=1.
Are the dx API feature complete?
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From what I understand only available currently for certain games, but that changes in September. 
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