Valve leaks FSR 4.1 for RDNA 3 and RDNA 3.5 GPUs through Proton Experimental

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AMD planned RDNA 3 support for July, but Valve may have pushed the files early

FSR 4.1 file works with RDNA 3 and RDNA 3.5 GPUs



Valve appears to have pushed an early FSR 4.1 build through Proton Experimental. The file was spotted in the Proton Experimental depot, but the manifest was reportedly removed shortly after it appeared.

That may explain why the file could not be downloaded through Steam Console earlier when I was preparing our previous post. The depot was visible, but access to the specific manifest did not work. Luckily, some people managed to download it just in time. 

Valve leaked FSR 4.1 INT8

According to a post on the Radeon subreddit, one user managed to download the manifest before Valve removed it. The post claims the leaked file is “FSR 4.1.1 Int8” and includes “amdxcffx64.dll.” The same post says the file is signed, which should make it usable in games that check DLL signatures.

The leak is interesting because AMD has already confirmed FSR 4.1 support for RDNA 3 GPUs, including Radeon RX 7000 series cards, for July. RDNA 2 support is planned later, with AMD targeting early 2027 for Radeon RX 6000 series and other RDNA 2 products. 

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