Can't get FSR to work on Radeon 6700 XT

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Oct 22, 2025
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Hello,
I'll get straight to the point. I tried to implement FSR 4 into two games using OptiScaler. I can run FSR 2.1.2 and FSR 3, but when I attempt to apply FSR 3.x.x (FSR 4), the games crash. I’ve tested this with both the old and new AMD drivers, and even performed a DDU to uninstall the drivers before swapping the DLLs into the old drivers, but no luck.

I’ve run the games at 1080p with low settings, trying quality, balanced, and performance modes, yet they still crash.

The games in question are Horizon Zero Dawn (not the remastered version) and A Plague Tale: Requiem.

Could this issue be related to my Windows 10 setup? I’ve also seen other users reporting the same problem on Windows 11.
 
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