amd published its FidelityFX Super Resolution SDK 2.0 alongside the machine learning-based FSR 4, but the company also accidentally exposed FSR 4 libraries on its GPUOpen project. the files were removed from the library, but screenshots of the file directory were captured by observers, providing a rare look at components of FSR 4 that had been announced as exclusive to Radeon RX 9000 series hardware.
one notable discovery in the directory was the inclusion of 8-bit integer (INT8) libraries. the article states that INT8 implementations use fewer resources but are less precise than the libraries used in RDNA 4, and that their presence indicates there is or may have been an intention to support RX 7000 GPUs. the files were packaged as .HLSL shaders, which aligns with pc deployment rather than console-specific formats.
the leak adds weight to prior hints and community mod projects that have managed to run FSR 4 on older RDNA hardware. while the screenshots are not a formal announcement, they represent a substantial signal that amd may be working on porting FSR 4 beyond the initial RX 9000 exclusivity. there is also mention of speculation about PlayStation 5 Pro receiving INT8 shaders, but the differing shader file type (.HLSL versus the PS5 .PSSL) suggests the leaked assets were intended for pc use.
