When AMD updated their FidelityFX SDK repo on GitHub, they accidentally pushed files they were not supposed to. This includes files required to compile your own FSR 4 DLL, however there were also FSR 4 Int8 files, Int8 being something many GPUs can run as opposed to FP8. With time people managed to compile and run this Int8 FSR 4 on GPUs ranging from RDNA 2 and 3 to even an RTX 3060ti.
The image quality of this Int8 version is substantially superior to FSR 3.1, and also resolves hair and distant detail better than XeSS (which is also an Int8 model).
The only downside is that it can be expensive to run, taking up almost triple the processing power of FSR 3.1 on RDNA 3 (0.6ms vs 1.9ms), and quadruple the processing power of transformer DLSS on an RTX 3060ti.
This model was surprisingly designed to run on RDNA 4, though they later decided to go with FP8 which, while lowering the processing power requirements, made it compatible with only RDNA 4.
I would estimate that a fully optimised FSR 4 for RDNA 3 could be faster than XeSS while providing superior image quality. Even the leaked one could achieve that if it was compiled with WMMA support. As for RDNA 2, which doesn’t support WMMA instructions, you’d have either a smaller model with worse image quality that doesn’t take up as much processing power, or the same model as RDNA 3, which would heavily reduce FPS at modes like NativeAA. And NVIDIA GPU support likely wouldn’t even be considered.
Thanks to AthleteDependent926 release
Replace the games same dll name …
Compiled FSR 4.0.2 INT8 + FP8 DLL
