Valve may be bringing AMD FSR 4 to Steam Deck via Proton Experimental

[Redaktion]

Valve appears to be testing AMD FSR 4 support through Steam and Proton Experimental, potentially allowing many FSR 3-enabled games on SteamOS and Linux to access the newer upscaling path without third-party tools, a move that could benefit other similarly configured handhelds too.

https://www.notebookcheck.net/Valve-may-be-bringing-AMD-FSR-4-to-Steam-Deck-via-Proton-Experimental.1327935.0.html

[what about RDNA3.5 iGPUs?]

AMD, what about all the countless RDNA 3.5 iGPUs, like also in the expensive Strix Halo PCs? Wouldn't they especially profit from hardware-based upscaling? (it's a rhetoric question) Even if it's a 720p resolution, it looks much better than FSR3.x:
youtube.com/watch?v=VPMOjdvmHMk "FSR4 on RDNA3 on Windows!!! How To Guide and Side by Sides Tested on RX 7800 XT"
youtube.com/watch?v=yB0qmTCzrmI "AMD Tried To Hide This From You - FSR 4 INT8 on RDNA 3 & 2 Tested"

[heffeque]

AMD, what about all the countless RDNA 3.5 iGPUs, like also in the expensive Strix Halo PCs? Wouldn't they especially profit from hardware-based upscaling? (it's a rhetoric question) Even if it's a 720p resolution, it looks much better than FSR3.x:
youtube.com/watch?v=VPMOjdvmHMk "FSR4 on RDNA3 on Windows!!! How To Guide and Side by Sides Tested on RX 7800 XT"
youtube.com/watch?v=yB0qmTCzrmI "AMD Tried To Hide This From You - FSR 4 INT8 on RDNA 3 & 2 Tested"

Just ran Horizon Zero Dawn Remastered with a Framework Desktop (Strix Halo 128 GB), and FSR 4.1.1 is working correctly:
https://postimg.cc/p914JhYn
My TV is 1080@60 (so sorry, I can't test 4K@120), I put the highest preset, and activated all the FSR goodies.
Plenty of FPS to spare. Fan not audible, so it's sipping very little power.