AMD FSR 4 upscaling works on older Radeon GPUs

AMD is working on a version of FSR 4 for older Radeon graphics cards, and today we are testing a work-in-progress build to see how it's shaping up. Is this version as good as FSR 4 in terms of image quality? How does it perform on RDNA 3 and RDNA 2 GPUs? And, on balance, is it going to be a viable option for upscaling if AMD releases it officially? We are going to answer all of those questions today.

As we know, FSR 4 is only officially supported on the latest RDNA 4 graphics cards, such as the Radeon RX 9070 XT. This is because FSR 4 uses the FP8 data format to accelerate the AI upscaling algorithm, which is only supported in AMD's RDNA 4 architecture.

However, AMD has been developing a version of FSR 4 that uses the INT8 format instead, which is more broadly supported. AMD introduced INT8 support with the RDNA 2 architecture, so theoretically, the INT8 version of FSR 4 could work on GPUs as old as the RX 6000 series. [...]

Video version: YouTube