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

Live updates

1. 1h ago

   Valve leaks FSR 4.1.1 INT8 build via Proton Experimental

   Valve accidentally distributed an unfinished INT8 variant of AMD FSR 4.1.1 through Proton Experimental. Community testing confirms the build works on RDNA 3.5 integrated graphics, specifically the Radeon 890M. The software was quickly removed from Valve servers after discovery.

   What's confirmed:

   • AMD FSR 4.1.1 ML-powered upscaling is available for Radeon RX 7000 Series GPUs via SDK 2.3.
   • A leaked FSR 4.1.1 INT8 build is compatible with RDNA 3.5 integrated graphics.
   • The leaked library has a file version of 2.3.0.2913 and was last modified on June 22, 2026.
   • The FSR 4.1.1 INT8 build functions on the Radeon 890M integrated GPU.
   • Valve distributed the FSR 4.1.1 build through Proton Experimental before removing it.

   Still unconfirmed:

   • RDNA 2 support for FSR 4.1 will follow later.
   • FSR 4 support may be coming to the Steam Deck via Proton Experimental.
   • Valve is working to bring FSR 4 to the Steam Machine.
   confidence 95%
2. 4d ago

   Valve Leaks AMD FSR 4.1 Support via Proton Experimental

   Valve has integrated AMD FSR 4.1 into Proton Experimental, enabling the upscaler for RDNA 3 and RDNA 3.5 GPUs. This deployment occurred ahead of the Steam Machine launch. The leak includes an INT8 model designed to bring FSR 4.1 to older Radeon hardware.

   What's confirmed:

   • Valve integrated AMD FSR 4.1 into Proton Experimental for RDNA 3 and RDNA 3.5 GPUs.
   • The FSR 4.1 leak involves an INT8 model.
   • FSR 4.1 support for RDNA 3 GPUs arrived via Valve one day before AMD's official release.
   • AMD promises quality parity between FSR 4.1 on RDNA 3 and RDNA 4.

   Still unconfirmed:

   • The Xbox Series X will receive a free graphics upgrade via FSR 4.1.
   confidence 90%