ffx_fsr2_api_vk_x64.dll is a critical component of AMD's FidelityFX Super Resolution (FSR) 2.0 SDK
Unlike DLSS, this library works across various hardware, including older AMD cards and Nvidia GTX-series cards. Stability:
The team's work also paved the way for future projects, as developers began to explore similar techniques to enhance their own games. The collaboration between Square Enix, AMD, and the VK API community had yielded a remarkable outcome, one that would inspire a new generation of gamers and developers alike.
: Unlike some proprietary technologies, this DLL works on both AMD and NVIDIA GPUs that support Vulkan. How to Use the DLL for Game Modding
Part 5: Advanced Optimization – Tuning the DLL Parameters
When you get the DLL working, the default parameters may look soft. You can hex-edit the .dll or create a JSON config file (if the developer exposed it). Key variables inside the DLL that affect "working" quality:
Step 2: Validate the ReBAR (Resizable BAR) Alignment
FSR2’s temporal accumulation relies on 128-byte aligned buffer copies. If your motherboard has ReBAR enabled but the card uses a 256-byte alignment, the vk_x64.dll will fail to map memory.
5. Performance Tuning for x64 / Vulkan
- Workgroup sizes: FSR 2 uses 8x8 or 16x16 compute shader threads. Align dispatch dimensions to multiples of these.
- Async compute: Dispatch on a separate compute queue if available (but avoid overlapping with graphics queue for temporal data).
- Memory footprint: ~20–40 MB VRAM for history buffers + scratch.
- Provide a minimal example outline of Vulkan hook points and FSR 2 descriptor layouts, or
- Draft a sample per-frame pseudo-code sequence for the Vulkan dispatch and synchronization.
