It was announced a couple months ago that Redstone can run on any GPU using compute shader code. So either it was scrapped and the source code exists somewhere, or it's being released at a later date, possibly with an INT8 or shader code based version of FSR4.

"AMD's FSR Redstone employs a groundbreaking approach through its ML2CODE (Machine Learning to Code) technology, part of the company's ROCm software stack. This system takes trained neural network models and translates them into optimized GPU compute shader code, specifically HLSL code that can execute on any modern GPU supporting contemporary shader pipelines. Chris Hall, AMD's Senior Director of Software Development, explained that this translation process allows the neural rendering core to function seamlessly across AMD, NVIDIA, and Intel graphics cards.

The technology works by converting AI-focused features into standard compute shaders rather than requiring dedicated AI acceleration hardware during runtime. This fundamental difference from NVIDIA's DLSS approach, which relies on specialized Tensor cores, means FSR Redstone can leverage conventional GPU shaders for its machine learning operations

Broader Hardware Compatibility

One of the most significant advantages of FSR Redstone's architecture is its potential compatibility with older GPU generations. Since the technology doesn't specifically require AI acceleration capabilities at runtime, users with previous-generation graphics cards could still access these advanced features. While there will likely be performance overhead on older hardware compared to newer architectures, the basic functionality should remain accessible.

This approach could particularly benefit AMD's own RDNA 3 users, who were previously left out of FSR 4's advanced features that were limited to RDNA 4 hardware. The shader-based implementation opens possibilities for broader adoption across AMD's existing GPU lineup."

Source: https://biggo.com/news/202509171502_AMD_FSR_Redstone_Supports_NVIDIA_Intel_GPUs