AMD FidelityFX is a suite of visual enhancement technologies designed to improve the graphics quality and performance of video games. It includes features like FidelityFX Super Resolution (FSR), which upscales lower-resolution images to higher resolutions, providing better frame rates without sacrificing visual fidelity. The technology is compatible with a wide range of graphics cards, not just those made by AMD. This allows developers to implement FidelityFX in their games, enhancing the gaming experience for players using various hardware setups while maintaining high-quality visuals.