for DirectX 12), the Vulkan version is specifically required for users running games in Vulkan mode. Common Issues in "Repacks"
The Vulkan flavor of this DLL ( vk ) is highly optimized for Linux-based gaming environments. Because Valve’s Steam Deck and desktop Linux gaming rely on Proton (which translates DirectX calls into Vulkan), having the native Vulkan FSR 2 API file ensures smooth performance and native upscaling on handheld gaming PCs. 3. Out-of-the-Box Functionality ffx fsr2 api vk x64dll repack full