DLSS Swapper Tool Enables Manual DLL Swap to Upgrade FSR 3.1 to FSR 4

In an exciting development for gamers, DLSS Swapper now joins Optiscaler as a tool capable of enhancing visual quality by replacing FSR 3.1 with FSR 4 in games that support the earlier version.

FSR 4: Enhanced Visual Quality and Compatibility

AMD's FidelityFX Super Resolution 4 (FSR 4) represents the latest iteration of AMD’s upscaling technology designed specifically for RDNA 4 graphics cards. While native support for FSR 4 is limited to a select few games—requiring game developers to integrate it—you can now utilize a workaround to enable it by substituting older versions of FSR.

Transform Your Gaming Experience with Advanced Tools

Gaming enthusiasts have long relied on tools like Optiscaler and DLSS Swapper to upgrade older upscaling technologies such as DLSS, XeSS, and FSR to their latest counterparts. While Optiscaler previously held the distinction of being the sole tool capable of swapping FSR 3.1 for FSR 4, DLSS Swapper has now proven its effectiveness as well, albeit through a slightly different approach.

DLSS Swapper streamlines the process with its user-friendly interface, allowing for the seamless replacement of outdated upscaling files. In contrast, Optiscaler necessitates a manual process—users must copy files directly to the game folder and execute a batch application to achieve the swap.

Someone on our GitHub just did a manual DLL swap and got FSR 4 to work on a FSR 3.1 game 🤯That means the SDK with those new FSR DLLs will allow any FSR 3.1 game to use FSR 4 sooner rather than later.https://t.co/EUAdkbk1JI

— DLSS Swapper (@dlss_swapper) August 28, 2025

Successful Manual DLL Swaps and Future Prospects

Reportedly, gamers can employ DLSS Swapper to substitute the DLL files of their games, effectively replacing FSR 3.1 DLLs with those for FSR 4. However, it is essential that the game supports FSR 3.1 for FSR 4 to function. Additionally, users must have access to the latest Radeon RX 9000 series graphics cards. Intriguingly, feedback from the developer indicates that one user successfully activated FSR 4 using this method, an outcome that was initially deemed unlikely.

This breakthrough is particularly advantageous for those with an RX 9000 GPU and existing games featuring FSR 3.1. Since the practice of manual DLL swapping wasn’t widely discussed or expected to yield results, further reports on this phenomenon would be welcomed. With Optiscaler already providing an efficient solution, there is hope for an official update to DLSS Swapper, which would simplify the swapping process and eliminate the need for manual DLL adjustments.

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