FSR 4 on Radeon RX 7000 and even GeForce RTX 30 series is here, it’s just not official yet
AMD’s latest upscaling technology, FSR 4, launched as an exclusive to the new Radeon RX 9000 series graphics cards (currently headlined by the flagship RX 9070 XT). But thanks to a slip-up and some quick work from the community, players with older hardware can now give it a try, even though it’s not officially supported.
Back in August, AMD accidentally uploaded some of the FSR 4 development source code to its GPUOpen GitHub repository. The code was quickly taken down, but not before some users managed to fork and download it. While FSR 1, FSR 2, and FSR 3 are fully open-source, FSR 4 hasn’t been released publicly yet, which made this leak especially interesting. The leaked files confirmed that AMD is working on an INT8 version of FSR 4, something that wasn’t widely known before.
FSR 4 on older GPUs is possible
After the leak, devs got to work, and the community managed to successfully compile the code into a DLL file. This unofficial build made it possible to use FSR 4 on Radeon RX 7000 series GPUs and even Nvidia’s RTX 30 series cards. That’s great news for those who don’t own the RX 9000 series GPUs but still want to try AMD’s latest upscaling technology.
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The results, however, are mixed. According to early testers, the modded FSR 4 does provide better image quality compared to FSR 3.1. However, there is a trade-off: the processing time is noticeably higher. On an RTX 3060 Ti, for example, FSR 4 took 1.9 ms per frame, compared to just 0.6 ms with FSR 3.1.
In any case, if you do end up using the modded FSR 4 on an RX 7000 or RTX 30 series card, do keep in mind that this isn’t the official version, and you can end up facing performance issues. It’s great to see that the early tests are showing promising results, but for some users, it can end up doing more harm than good.
Further testing from YouTuber Ancient Gameplays demonstrates how to set it up on Windows and showcases the tech in Cyberpunk 2077 and Black Myth: Wukong. While FSR 4 reliably produces cleaner visuals with less shimmering, it does (or at least this unofficial version does) mean lower framerates comparatively – still more than native rendering, of course.
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