AMD releases FidelityFX SDK 2.0, FSR4 ‘briefly’ goes open source allegedly for RX 7000 series GPUs

[bssunilreddy]

AMD releases FidelityFX SDK 2.0, FSR4 ‘briefly’ goes open source allegedly for RX 7000 series GPUs

The AMD FidelityFX™ SDK v2.0 update includes cutting-edge ML upscaler AMD FidelityFX Super Resolution 4 (FSR 4). The new ML-accelerated AMD FSR 4 upscaling algorithm is trained using high-quality ground truth game data on AMD Instinct™ GPUs. FSR 4 uses the hardware-accelerated features of the AMD RDNA™ 4 architecture designed to give the user maximum upscaling quality while still providing a next-level gaming experience with a substantial game performance boost.

According to uzzi38 “But there’s so many copies of it out there that there’s little point hiding what’s in them, except from maybe the unfinished attempts at an int8 FSR4 model”.

“Confirmation for sure that AMD was interested in creating a watered down version of the model for less capable hardware”.

Source: https://videocardz.com/newz/amd-releases-fidelityfx-sdk-2-0 & AMD FidelityFX Super Resolution 4 now available on GPUOpen - AMD GPUOpen & https://x.com/uzzi38/status/1958209847507480834

[TADPOOL]

Before AMD (officially) let the FSR 4 code slip, people were already testing it on RX 7000 series cards with pre-release builds. Since RDNA 3 lacks FP8 cores, the AI frame-generation had to be emulated, which improved image quality over FSR 3.1 but came with a performance hit.

With the FSR 3.1.5 release and FSR 4 code now available, there’s a more stable path to experiment. Running the source on top of 3.1.5 could bring visuals closer to full FSR 4 at 1080p/1440p, possibly with less FPS loss than the early hacks.

The hardware limits haven’t changed means AI ops will be slower than RDNA 4, some games may hit compatibility or anti-cheat issues. It’s feasible for better visuals, but not at RDNA 4 level speed or stability.

[bssunilreddy]

AMD FidelityFX SDK 2.0 & FSR 4.0.2 Now Available, Next-Gen Neural Rendering Technologies & FSR Redstone Ready For Devs

AMD has just announced its FidelityFX SDK 2.0, along with the availability of FidelityFX Super Resolution 4 for developers, which paves the path for next-gen Neural Rendering technologies & FSR Redstone.

AMD’s FidelityFX SDK 2.0 Launched: Adds Support For FSR 4, Neural Rendering Technologies, FSR Redstone & Much More

At Gamescom 2025, AMD is going big with its FidelityFX suite, which is receiving the 2.0 update. With this new update, developers will now be able to access various technologies such as the upcoming ML-based neural rendering tech and FSR Redstone. With the SDK, developers will be able to easily integrate these into their games.

following are the key changes in FidelityFX SDK 2.0:

• To better streamline AMD FSR Redstone and other future ML-based technology deployment, our existing FidelityFX SDK features will continue to be available as v1.1.4.
• The AMD FidelityFX SDK 2.0 represents a new suite of features (starting with AMD FSR 4 upscaling and FSR 3.1.5 analytical frame generation) that have been re-architected in preparation for the next generation of AMD hardware and ML-based technologies.
• With AMD FidelityFX SDK 2.0 and AMD FSR Redstone, future AMD Software: Adrenalin Edition driver releases can update the version of ML-based technologies used in-game by default. This ensures players experience the latest available technology without requiring game updates for each title.
  • Games that have previously integrated AMD FSR 3.1 and later are eligible for automatic version upgrades to FSR 4 Upscaling technology via future AMD Software: Adrenalin Edition releases.
  • Games that have previously integrated AMD FSR 3.1.4 will be eligible for automatic version upgrades to our upcoming FSR ML Frame Generation technology via future AMD Software: Adrenalin Edition releases.
• AMD FSR 3.1.5 available in the AMD FidelityFX SDK 2.0 is a minor update for the new SDK, and FSR 3.1.5 upscaling is included for support of AMD Radeon RX 7000 Series graphics cards and older.

You can download the SDK v2 package here, read the FSR 4 Documentation here, and also view the SDK 2 on GitHub here.

In addition to the SDK, AMD is also adding its latest FSR 4.0.2 in GPUOpen, allowing developers to access the latest upscaling and frame-generation methods. As detailed before, FSR 4 is a vastly improved scaler, using ML/AI for upscaling. The image quality has been improved significantly versus the older FSR 3. The list of changes/improvements includes:

• Reduced ghosting on moving objects
• Improved preservation of particle effects
• Superior detail and temporal stability
• Simple API Upgrade Path
• Unreal Engine 5 plugin
• Automatic updates
• Supported products

The following is a difference between FSR 4 and FSR 3 upscaling:


Developers will have a lot of ease when switching from FSR 3.1 to FSR 4 since it is based on the same API. FSR 4 is also available as pre-built, signed DLLs as part of FidelityFX SDK 2.0, and there’s also a UE (Unreal Engine) specific plugin which supports version 5.1 to 5.6.

AMD’s FidelityFX SDK 2.0 with FSR 4.0.2 upscaling will require a Radeon RX 9000 Series GPU or above, while FidelityFX SDK 2.0, with FSR 3.1.5 upscaling/frame-gen will require a GPU that supports Shader Model 6.2 or above. With this announcement, it looks like we are one step closer to the launch of AMD’s FSR Redstone update, which should bring them closer to NVIDIA’s in terms of neural rendering techniques.

Source: https://wccftech.com/amd-fidelityfx-sdk-2-0-fsr-4-0-2-now-available-next-gen-neural-rendering-technologies-fsr-redstone-ready-for-devs/

[bssunilreddy]

AMD confirms FSR4 ‘open-source’ release was a mistake, but the MIT license may be hard to undo

Source: https://videocardz.com/newz/amd-confirms-fsr4-open-source-release-was-a-mistake-but-the-mit-license-may-be-hard-to-undo

Read the comments as they provide some providence as to why or how the open source release was termed as a mistake.

[bssunilreddy]

AMD’s FSR 4 source code reveals potential support on older Radeon GPUs

FSR 4 support is theoretically possible on RDNA 3 GPUs, but performance/quality won’t be close to AI-capable RDNA 4 solutions.

Two days ago, AMD published its FidelityFX SDK 2.0 via its GPUOpen project, which included FSR 4 upscaling and FSR 3.1.5 frame generation support. But, during the process, the brand unintentionally released the full source code of FSR 4 on GitHub. As usual, the internet was quick to capture screenshots and collect as much information as possible before AMD had time to react.

With the genie out of the bottle, users began combing the collected data, uncovering sneak peeks into FSR 4’s inner workings. One of the biggest discoveries is undoubtedly the inclusion of an 8-bit integer (INT8) library, which uses fewer resources at the cost of precision, hinting that AMD was strongly considering or was working on a version of FSR 4 compatible with older Radeon RX 7000 GPUs.

Since the Radeon RX 9000 chips already feature the AI capabilities required for the regular FSR 4 implementation, this alternative version is most likely meant for older hardware, which currently lacks an equivalent upscaling technology. Thus, this FSR 4 ‘leak’ confirms that AMD has at least tried to make FSR 4 work on RDNA 3 GPUs as it promised during the initial launch of the feature.

Unfortunately, these files aren’t indicating whether AMD has stopped or is continuing this project. The good news is that with the source code now in nature, modders will undoubtedly leverage it to build mods capable of enabling FSR 4 on old GPUs. While these are unlikely to deliver the same quality and performance as the proper support offered by RDNA 4’s FP8 processing, they will at least give users another option to choose from.

That said, the best results will only be possible with AMD’s intervention. If the company ends up releasing an official FSR 4 variant on RDNA 3 and older GPUs, you can expect it to offer the best quality and performance, similar to what Intel has done with its XeSS DP4a, which doesn’t require Arc GPU’s XMX hardware AI-accelerators. This may even open the way to support some features from the upcoming Redstone project.

Either way, this is a good thing for gamers. If not AMD, the modding community will do something with it, because seeing what they managed to do with so little insight into FSR 4’s inner workings, everything is possible.

Source: https://www.club386.com/amds-fsr-4-source-code-reveals-potential-support-on-older-radeon-gpus/