Valve integrates AMD FidelityFX Super Resolution 4 into Steam to boost upscaling performance and compatibility for Linux gaming and legacy graphics cards
Valve has added a new dynamic link library file into the Steam database which indicates the AMD FidelityFX Super Resolution 4 will be available on more hardware options. Released by industry analyst Brad Lynch, known as SadlyItsBradley, this map is to extend the newly unveiled upscaling technology to legacy graphics cards rather than being restricted to the new RDNA4 architecture. It is a major performance boon for the Linux gaming community.
Valve just added the version of AMD’s FSR4 that was announced last month and adds support to older GPUs rather than just RDNA4
— Brad Lynch (@SadlyItsBradley) June 22, 2026
This DLL file, added to Steam, and coming to Proton Experimental will likely allow Steam Machine/SteamOS users to “upgrade” FSR3 supported games to FSR4 pic.twitter.com/kNNhMDS34D
This will probably add the particular file into Steam which will then be moved into Proton Experimental, the compatibility layer for running Windows games on Linux. This should enable SteamOS and Steam Machines to force FSR3 supported games to use the greater FSR4 algorithms. By updating the translation layer, players will be able to take advantage of enhanced image reconstruction and frame generation methods without developers bothering to release official game patches for previous titles.
Valve further improves the backward compatibility of FSR4 by stretching its support over older graphic processors, and not only strongly supporting the RDNA4 architecture but also allowing all previous ones to run this new software level, which is relevant for gaming portable consoles and cheap hardware to allow rendering various titles without native resolution. Its employment via Proton makes it clear that the setup will be tailored in a very versatile manner to the various constraints to always optimize FPS and a good compromising quality.
