For fans of gaming conspiracy theories, a recent cryptic post from a former AMD lead has sparked significant debate. Colin Riley, the former head of AMD’s FSR development—including the first version of FSR 4—recently used a Jose Mourinho meme to dodge questions regarding why the INT8 version of FSR 4 remains unavailable for older hardware.

In response to inquiries about why the company won't release the technology for older GPUs, Riley posted the famous "I prefer not to speak. If I speak I am in big trouble" meme. This follows a period of intense speculation regarding AMD's decision to limit advanced upscaling features to their newest architecture.

The Mystery of the INT8 Version of FSR 4 Support

The controversy surrounding the INT8 version of FSR 4 began when AMD accidentally published the source code to its GPUOpen GitHub repository. While FSR 4 utilizes machine learning for vastly superior upscaling compared to previous hand-coded algorithms, it is currently restricted to the latest RDNA 4 GPUs. These newer cards utilize an FP8 data format that is not fully supported by RDNA 2 or 3 generations of AMD graphics.

As of April 22, 2026, the community has been searching for answers. While the Optiscaler community tool makes it reasonably easy to run FSR 4 on older AMD GPUs with some limitations, official support is non-existent. This has led to several circulating theories:

  • Hardware Incentivization: The idea that AMD wants to force gamers to upgrade to RDNA 4 GPUs.
  • Sony Exclusivity: A potential deal where Sony holds the rights to run the INT8 version on PlayStation consoles.
  • Corporate Negligence: The theory that AMD simply does not see enough value in investing the resources required for older hardware support.

Connection to PS5 Pro and RDNA Architecture

As it stands, the INT8 version of FSR 4 is only officially supported on the Sony PlayStation 5 Pro, rather than older PC GPUs. This connection is rooted in the fact that the technology dates back to RDNA 2 architecture.

AMD SVP Jack Huynh officially confirmed this link, stating that FSR 4.1 is "built on the same neural network foundation as the upgraded PSSR for PS5 Pro." While the technical foundation exists, the official rollout to the wider PC market remains stalled.

A Critique of AMD Leadership

The debate has moved beyond technical limitations and into the realm of corporate strategy. Riley himself recently commented on X, suggesting that the bottleneck isn't found in the code, but in the boardroom.

"It's not the engineers: its leadership not understanding software, ecosystems, mindshare and gaming technologies. Basic stuff really, and doubt it will change," Riley noted. While AMD has a history of eventually fixing these types of deployment errors, the future of upscaling for RDNA 2 and 3 users remains uncertain.