If your ffx fsr2 api vk x64dll is , follow this diagnostic flow:
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| Step | Action | Expected Outcome | | :--- | :--- | :--- | | | Verify game is 64-bit Vulkan. | Game uses .exe , not .x86 . Use GPU-Z to see Vulkan usage. | | 2 | Check file location. | DLL must be next to .exe or a subfolder listed in PATH . | | 3 | Confirm no antivirus quarantine. | Windows Defender sometimes deletes unsigned FSR mod DLLs. Restore and add exclusion. | | 4 | Check for dependency walker errors. | Use Dependency Walker tool. Missing vulkan-1.dll ? Install Vulkan Runtime. | | 5 | Review mod logs. | Most mods generate fsr_log.txt . Look for "Failed to create instance" or "Invalid arguments". | | 6 | Tweak in-game settings. | Disable motion blur & chromatic aberration (they corrupt FSR 2’s temporal feedback). Set game to exclusive fullscreen. | ffx fsr2 api vk x64dll work