Valve officially announces FSR 4.1 support for the Steam Machine through Proton Experimental

Valve officially announces FSR 4.1 support for the Steam Machine with the introduction of FSR 4.1 to the experimental branch of Proton.

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Aaron Klotz

Tech Reporter

Published Jul 30, 2026 2:55 PM CDT

1 minute & 15 seconds read time

TL;DR: Valve added AMD's FSR 4.1 to the Proton Experimental branch, enabling Steam Machine owners to use FSR 4.1 in compatible games though it remains experimental and may have issues. Games must already run FSR 3.1 or newer for Proton to upgrade them to FSR 4.1. Valve also released a Steam Machine CAD file and is fulfilling reservations daily.

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After promising FSR 4.1 support several weeks ago, Valve has officially introduced AMD's latest upscaling technology to the Steam Machine. In a Steam blog post, Valve states that FSR 4.1 is now available for Steam Machine owners to take advantage of in compatible games with the introduction of FSR 4.1 to the experimental branch of its Proton compatibility layer. Valve has also introduced a CAD file featuring the Steam Machine's external geometry for users who want to make their own accessories for the console.

Valve also provided an update on the Steam Machine's reservations and Waitlist, noting that they are fulfilling orders on a daily basis. Valve also expects everyone in the reservation queue to have the option to purchase a Steam Machine by the end of this year.

Valve officially announces FSR 4.1 support for the Steam Machine through Proton Experimental 2

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FSR 4.1 is AMD's latest upscaling technology that was originally aimed at RDNA 4 GPUs, but several weeks ago AMD finally announced official FSR 4.1 compatibility with RDNA 3 GPUs, with RDNA 2 support debuting in 2027. Around this time period, Valve also announced collaboration with AMD to bring FSR 4.1 support to the Steam Machine.

Read more: Valve promises Steam Machine reservation holders will get their chance to buy before 2027
Read more: AMD surprises RDNA 3 and RDNA 2 owners with FSR 4.1 support, arriving in July for RX 7000 series
Read more: AMD's new FSR 4.1 for RDNA 3 also works on RDNA 3.5 and RDNA 2 GPUs

Frequently Asked Questions

TweakBot answers common questions about this news using TweakTown's own coverage from this page and related content from our archive. Tap a question to reveal the answer, or type your own below.

Question #1

Which Steam Machine users can access FSR 4.1 right now via Proton Experimental?

Steam Machine owners can access FSR 4.1 right now by using Valve’s Proton Experimental branch for compatible games. Proton will upgrade games that are already running FSR 3.1 or newer to FSR 4.1, though the feature is still experimental and may have issues.

Answered

Question #2

Which games are eligible for automatic FSR 4.1 upgrades through Proton (what minimum FSR version is required)?

Proton Experimental will automatically upgrade games that are already using FSR 3.1 or newer to FSR 4.1. The feature is exposed through Valve's Proton Experimental branch.

Answered

Question #3

How is Valve handling Steam Machine reservations and when will everyone in the queue be able to buy one?

Valve is fulfilling Steam Machine orders from the reservation Waitlist on a daily basis. Valve expects everyone in the reservation queue to have the option to purchase a Steam Machine by the end of this year.

Answered

Have a question not listed here? Ask below and TweakBot will answer it.

Support for FSR 4.1 is still in an experimental stage, with the feature only being exposed through Valve's Proton Experimental branch as previously mentioned, so users might encounter some issues with the upscaler in games. FSR 4.1 in Proton form also behaves identically to the regular FSR 4.1 adaptation on Windows, in that games need to be running FSR 3.1 or newer for Proton to upgrade the game to FSR 4.1.