Overview
- Colin Riley, who helped lead early FSR 4 work at AMD, replied with a “I prefer not to speak” meme when asked why the INT8 build is not released for RDNA 2 and RDNA 3 cards.
- AMD still limits official FSR 4 support on PC to RDNA 4 GPUs that run the upscaler in the FP8 format.
- The INT8 variant exists and is officially supported on Sony’s PlayStation 5 Pro, which aligns with AMD’s statement that FSR 4.1 shares a neural foundation with the console’s upgraded scaler.
- AMD accidentally posted INT8 FSR 4 code on its GPUOpen GitHub earlier in the rollout, and community tools like Optiscaler now load FSR 4 on older GPUs without AMD’s validation.
- Wccftech reports Riley also said many GPUOpen and FidelityFX team members have left AMD for Nvidia or Intel, offering one possible reason the rollout has struggled.