AMD officially rolled out its FSR Redstone technology in December 2025. Tailored specifically for Radeon RX 9000 series graphics cards built on the 'RDNA 4' architecture, this technology harnesses the power of machine learning to elevate ray tracing computations and enhance visual smoothness through frame interpolation. Yet, feedback from early users points to a significant issue: despite achieving a doubled displayed frame rate, activating the frame interpolation function introduces perceptible stuttering, erratic frame transitions, edge tearing, and ghosting artifacts.

An in-depth evaluation uncovers that the root cause stems from FSR Redstone's excessive and erratic processing times when generating virtual frames. This leads to an asynchronous output that fails to synchronize with monitor refresh rates. During tests conducted in Industrial Age 2, frame generation times exhibited erratic fluctuations, ranging from nearly 0ms to surpassing 12ms. Notably, latency curves only stabilized after frame interpolation was disabled. The performance also varied across different games—Cyberpunk 2077 demonstrated smaller latency fluctuations, offering a relatively comfortable visual experience, whereas God of War: Ragnarök continued to grapple with stuttering in complex scenes.

Furthermore, displays equipped with VRR (Variable Refresh Rate) or FreeSync technology seemed to amplify this instability, intensifying screen flickering. Despite the current shortcomings of FSR Redstone technology, considering its recent market debut and AMD's proven track record of ongoing optimization, it is anticipated that subsequent driver updates will incrementally address these issues. Ultimately, this will empower players to fully appreciate the visual quality enhancements delivered by machine learning.