AMD FSR 4 Neuheiten Image © AMDAMD FSR 4 Neuheiten (Image © AMD)

The implementation is currently limited to the “Proton Experimental” branch. As it is provided in the experimental version, the feature is not yet considered a stable version. The development focus is primarily on SteamOS and the Steam Machine. This indicates that Valve is prioritizing optimizing the upscaler for its own hardware and operating system before a broader, more stable rollout.

Hardware limitations and integrated GPUs

While discrete RDNA-3 GPUs are supported, there is a clear gap for integrated graphics cards. Currently, Radeon iGPUs, including the 780M and 890M models that are widely used in the gaming handheld and mini-PC market, are not officially supported in this update. It remains unclear whether Valve will extend official support to these integrated chips in future updates, although the company has contributed to Linux graphics drivers and game optimizations in the past.

Third-party alternatives for iGPU users

Despite the lack of official support for integrated GPUs, some members of the community have found ways to implement the feature. According to reports, users of RDNA-3-based iGPU systems can manually enable FSR 4 by using external tools such as OptiScaler, which reportedly results in a working implementation of the upscaler on unsupported hardware.