Leaked FSR 4.1.1 drivers confirm INT8 upscaling on RDNA 3.5 hardware

The leak confirms that AMD's AI-based upscaling is technically viable on current-generation handhelds and APUs, despite the company's prior silence on RDNA 3.5 support. For the streaming and cloud gaming sector, this signal suggests that low-power client devices like the Steam Deck successor or ROG Ally series will soon access high-fidelity upscaling previously reserved for discrete GPUs. This reduces the client-side hardware barrier for high-resolution video and gaming. Watch for the official release of AMD's 'lightweight machine learning models' specifically tuned for bandwidth-constrained integrated graphics.

The leak coincided with AMD's official early release of FSR 4.1 for Radeon RX 7000 series desktop GPUs on June 22, 2026. According to reporting from TechPowerUp and Overclock3D, the official rollout arrived nearly a month ahead of its projected July schedule, likely as a response to the community-driven validation of the leaked files. AMD SVP Jack Huynh confirmed via X (formerly Twitter) that while the RX 9000 series utilizes FP8 instructions for optimal performance, the company is specifically developing 'lightweight machine learning models' to address the lower memory bandwidth found in APU and iGPU environments.

Simultaneous reports from GameSpot indicate that FSR 4.1 technology now serves as the foundation for Sony's PSSR 2 upscaling on the PlayStation 5 Pro. This alignment across PC and console ecosystems suggests a standardized AI upscaling pipeline that could streamline cross-platform optimization for developers. Furthermore, per Valve's recent announcements in June 2026, the company is actively preparing a new 'Steam Machine' and 'Steam Frame' hardware lineup, which utilizes the Proton Experimental layer and stands to benefit significantly from the integrated FSR 4.1 support found in the leak.

While the community successfully injected the INT8 model into older RDNA 2 hardware like the RX 6900 XT, users noted visual artifacts that are not present on native RDNA 3 or 3.5 architectures. Per Tom's Hardware, official FSR 4.1 support for these older Radeon RX 6000 series cards is not anticipated until early 2027, as AMD continues to refine the performance tradeoffs inherent in backporting AI models to non-AI-native hardware. The current focus remains on stabilizing the INT8 path for the 'Ryzen AI' mobile processor family which powers most modern handheld gaming devices.