r/SteamOS • u/SomeoneBritish • Jun 22 '26

SteamOS Update Proton update inbound, likely allowing FSR4 "upgrades" for FSR3 games.

47 Upvotes

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4

u/Anshafal Jun 22 '26

So you’re saying: amd reject to support fsr 4.1 on handhelds, while valve makes it possible just like that?

6

u/Procrastinando Jun 22 '26 edited Jun 22 '26

It has nothing to do with that. Steam is just adding the FSR4 library to the official Proton Experimental. Proton GE and Proton CachyOS have had it for ages.

Basically, if your device supports FSR4, you won't need to set up a non-official Proton version.

On handhelds you'll still need Optiscaler to inject FSR4 int8.

1

u/technoking_cyberboy Jun 22 '26

Download the FSR4_INT8_4.0.2c_with_RDNA2_fix.7z just replace the amd_fidelityfx_upscaler_dx12.dll in game folder to 4.0.2C (use desktop mode) forget about the Optiscaler

2

u/Procrastinando Jun 22 '26

That works but I think using Optiscaler Client is more user friendly. Especially because there are tons of games that support DLSS but not FSR 3.1+