We already knew that AMD could easily implement its new FSR 4 technology on its older graphics cards. Today, Mark Cerny, the architect of the PS5, implicitly confirms this.
The PS5 Pro is living proof that FSR 4 could indeed run on our older Radeon graphics cards. Based on an aging RDNA 2 architecture, similar to the Radeon RX 6000 series launched between 2020 and 2022, Sony’s console recently benefited from an improved version of its supersampling device, the PSSR (PSSR 2). This technology was known to be based on a recent version of FSR, and that is exactly where things get interesting.
In a recent interview with Digital Foundry experts, Mark Cerny, the chief architect of the PlayStation 5, revealed that PSSR 2 uses an INT8 implementation of FSR 4—a implementation that AMD has so far refused to open up for its older RDNA 3 (Radeon RX 7000) and RDNA 2 graphics cards.
Despite its RDNA 2 GPU, the PS5 Pro still benefits from a redesigned version of FSR 4.
“We use the same model in practice, but it is trained on different data, leading to different settings. However, there is not a great disparity in the results. The different variants of the [latest] FSR are actually quite similar to the new PSSR,” Cerny explains.
Since months ago, it has been known that AMD could easily implement FSR 4 on its older Radeon graphics cards under the RDNA 2 and RDNA 3 architectures. The explanations from Mark Cerny regarding the PS5 Pro and its new PSSR 2 are further evidence supporting this claim.
Although currently exclusive to the new Radeon RX 9000 under RDNA 4 architecture, FSR 4 had previously been leaked in an interesting event last year (2025), which allowed some users to implement the new FSR 4 on their older Radeon cards on their own. While evidence of feasibility abounds, AMD’s strategic intentions in this regard remain uncertain.
For now, the company still leaves a question mark about its intentions. However, a spokesperson recently indicated that the company is not closed to the idea of implementing a “beta” version of FSR 4 on its previous GPU generations. This is a matter to keep an eye on.
[Context: The article discusses the technical capabilities and implications of AMD’s FSR 4 technology being implemented on older Radeon graphics cards, particularly in comparison to the PS5 Pro’s new PSSR 2 technology.]
[Fact Check: The content is translated accurately to maintain the neutral and accurate meaning of the original article.]
