PS5 Pro's PSSR upscaler proves AMD FSR 4 can work on older Radeon GPUs

Recap: The latest advancements to AMD's FSR upscaler only support Radeon RX 9000 graphics cards, much to the chagrin of RX 6000 and 7000 owners. Their dissatisfaction worsened when AMD inadvertently leaked an improved version of FSR with broader hardware support, which the company has yet to acknowledge. A recent interview indicates that this variant may have been intended for Sony's PlayStation 5 Pro console.

PlayStation architect Mark Cerny recently told Digital Foundry that a new, improved version of Sony's PSSR upscaler utilizes 8-bit integer (INT8). Since the company developed PSSR and FSR 4 with AMD, Sony's new variant likely incorporates technology that could expand FSR 4 to GPUs that do not officially support it.

FSR 4 enhances image quality significantly compared to FSR 3, but only supports AMD's latest graphics cards. This is because the company introduced hardware support for 8-bit floating point (FP8 ...