...than the GRE but with FSR 4.0 and slightly better ray tracing performance.
I initially typed a way longer reply to the above, but to keep it short. I do think that FSR 4 will come to RDNA 3, but with some caveats. There is documentation covering rocWMMA, and then there are leaks and other things that I won't trust until I see it. FSR 4, like DLSS 4, will be a suite. Let's call this suite a stack, and I don't think that the entire stack will come to RDNA 3. RDNA 3 might get FSR 4 upscaling. It is also uncertain whether the entire RDNA 3 product stack will have the capabilities, mostly due to RAM.
At this time, we don't know how FSR 4 will compare to FSR 3 come to resource utilisation.
We know that Blackwell have dedicated hardware that will support their new RTX Neural Texture Compression tech. From the samples we have seen the compression looks phenomenal. According to Nvidia, the minimum requirement is Shader Model 6.0, but there is a cost without dedicated hardware. This is big.
AMD have a similar tech that they published in 2024, Neural Texture Block Compression (NTBC). Their white paper on the technologies made capable with this was using an RX 7900 XT as a target, and though there are dramatic improvements it comes at a cost. The question then is, will RDNA 4 have dedicated hardware to negate this cost, or will it be introduced with UDNA?
I can see NTBC being worked into the FSR 4 stack, and being exclusive to RDNA 4. There are many other things I can touch on, but then I am rambling. We don't know what will be new with RDNA 4. All I know is, AMD as a business, they would not wish to maintain too many branches accross a product stack that varies in architecture. Nvidia can do it because they have the resources. For people who bought RDNA 3, AMD never promised FSR 4 to you. Say the FSR 4 upscaling model is trained using FP8, which it does, to make that 'workable' with FP16/BF16/??? would require some serious optimisations, not only due to the RAM needed, but also the computation needed. Naturally I would assume it to be a lighter model, that is not as good, but is a improvement. Perhaps they will call it "FSR 3.5" as some have suggested. It is possible, but I am not a engineer so I know nothing.
Anyhow, on to the 28th.