AMD's FSR 4.1 upscaling is finally available for RDNA 3 GPUs, at least for Radeon RX 7000 series owners. Hallelujah, you can finally throw FSR 3.1 in the trash. Finally.
Today, we're taking a look at just how much of an upgrade this is. We've tested the official RDNA 3 release and will compare it with FSR 3.1 to see what Radeon owners are actually getting. We'll also compare it with the FP8 version running on RDNA 4 to find out whether AMD has made any meaningful compromises to bring the technology to older hardware. And, of course, there will be plenty of blue performance bar graphs.
The entire FSR 4 saga has been bizarre from the start. When AMD launched FSR 4 in early 2025, it positioned the AI upscaler as an RDNA 4 exclusive. According to AMD, the technology relied on FP8 instructions only supported by the new architecture, effectively ruling out older Radeon GPUs.
For a while, it looked like that was the end of the story. RDNA 3 owners appeared destined to remain stuck with the crappy FSR 3.1, which, if you've ever tried using it at 1440p, is pretty bad.
But then AMD did an oopsie. In August 2025, the company accidentally published the full FSR 4 source code, and hidden inside was a version built to use INT8 instructions instead of FP8. A glimmer of hope! Both RDNA 3 and RDNA 2 support INT8 operations, raising the obvious question: could FSR 4 actually run on older GPUs after all? We confirmed that was the case when we tested this "leaked" version. It worked perfectly well on RDNA 3 and delivered a huge improvement over FSR 3.1.
