# AMD FidelityFX SDK 2.4.0 expands FSR 4.1 upscaling to RDNA 2, adds Vulkan parity

> **Key takeaway:** AMD's open-source FSR SDK 2.4.0 brings ML-based upscaling to RDNA 2 GPUs and Ryzen AI handheld processors via a lightweight model, while achieving DirectX 12 feature parity across all Vulkan implementations.

**Published:** 2026-10-28T13:18:15+00:00 
**Source:** AMD GPUOpen FidelityFX SDK Releases 
**Category:** bigtech-foss 
**Canonical URL:** https://fosswire.org/news/amd-fidelityfx-sdk-240-expands-fsr-41-upscaling-to-rdna-2-ad.html 

## Summary
AMD has released version 2.4.0 of its FidelityFX Super Resolution SDK, expanding ML-based FSR 4.1 upscaling support to older RDNA 2 hardware and a broad range of Ryzen AI mobile and handheld processors. The release introduces a highly optimized, sub-INT8-size ML model purpose-built for integrated graphics in laptops and handheld devices like the Ryzen Z2 series, bringing frame generation and upscaling capabilities to power-constrained form factors. All major effects now achieve Vulkan support parity with their DirectX 12 counterparts, including Frame Generation 4.0.0 with new driver-assisted frame pacing for RX 9000-series GPUs.

The SDK also adds Intel PresentMon integration for frame generation metrics on DX12, standalone ambient and specular occlusion denoising in Ray Regeneration 1.2.1, and improved DLL lookup behavior for better deployment flexibility. The release maintains AMD's split-DLL architecture introduced in SDK 2.0.0 and provides signed binaries with minimal packaged downloads.

## What changes in FidelityFX SDK 2.4.0
- **FSR Upscaling 4.1.2 hardware expansion:** ML-based upscaling now supports AMD Radeon RX 6000 Series (RDNA 2) discrete GPUs and Ryzen AI Max 300/400 Series processors, with a highly optimized lightweight model for Ryzen AI 9 300/400 Series, Z2 A, and Z2 Extreme processors that is less than half the size of the original INT8 model.
- **Vulkan parity across all effects:** Frame Generation 4.0.0, Frame Generation 4.0.2, Frame Generation (Swapchain) 3.1.7 and 4.0.0, FSR 3.1.6, and Ray Regeneration 1.2.1 all now support Vulkan at feature parity with DirectX 12 implementations.
- **Driver-assisted frame pacing:** Frame Generation (Swapchain) 4.0.0 introduces driver-assisted frame pacing on DX12 and Vulkan, requiring AMD Radeon RX 9000 Series or later with Adrenalin driver 26.10.1 or newer.
- **Ray Regeneration denoising expansion:** Version 1.2.1 adds standalone ambient occlusion denoising and standalone specular occlusion denoising, alongside GPU memory usage query fixes and a new `FFX_DENOISER_DISPATCH_NON_ENCODED_ALBEDO` flag alias with deprecation of the gamma albedo variant.
- **SDK infrastructure improvements:** Shader blob decompression support added for Vulkan, effect DLLs now resolve adjacent to the loader DLL in addition to the executable path, and automatic driver override support extends to games built on FSR SDK 2.1+ or FidelityFX Super Resolution Frame Generation (Swapchain) 3.1.6+.

## Why it matters
The Vulkan parity milestone is particularly significant for Linux gaming through Proton and native titles, as it removes the historical feature gap that left Vulkan implementations trailing DirectX 12. The lightweight ML model for handheld and laptop APUs directly benefits Steam Deck-class devices and emerging Ryzen Z2-based handhelds, bringing competitive frame generation to battery-constrained Linux gaming hardware without requiring discrete GPUs. For developers, the improved DLL resolution and SDK-driver communication reduce deployment friction across distribution platforms.