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HoloDust on 23 September 2025
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Darc Requiem said:
JEMC said:

I took the results from the ComputerBase article (link) linked in the Videocarddz article (link).

I was talking about the performance hit compared to native rendering. There is an improvement, and I know that the above relative results won't be the same for every game or even GPU, but going trom 64 to 71 with FSR4 is a relatively small performance jump (10%) compared to native.

I'd rather play at native resolution at that point.

FSR4 Performance has better image quality than FSR3.1 Quality. FSR4 Performance provides a bigger FPS boost than FSR3.1 Quality with better image quality. So I stand by my statement. 

HoloDust said:

When using Quality, it's quite small...but the thing is, with FSR4 (like with DLSS) you can go quite aggressive and go with Performance, where you'll see quite a bit of more fps - check out both Daniel's video from yesterday on RDNA3 and DF Direct segment where Richard did some tests as well.

And if I understood correctly, this INT8 version is done so it can run on RDNA2 as well, without specific support for some things that RDNA3 offers, so if made for RDNA3 it would perform even better.

Now, this is not official, and there are issues, and it's most likely not as good in image quality as FSR4 FP8 for RDN4 - but as proof if concept I'd say it more than works and I'm really hoping to see it implemented officially, cause that will give those older cards a new lease of life.

RDNA3 has WMMA support. The INT8 version of FSR4 that "leaked" doesn't take advantage of that. If AMD continued to work on this and implemented WMMA support for RDNA3 it would increase the performance boost. Pure speculation on my part but I think FSR Redstone will include FSR4 INT8 with WMMA support for RDNA3 and the FSR4 INT8 for RDNA2.  AMD's APUs are not switching away from RNDA3.5 any time soon and their APU stack still includes RDNA2 on the low end. So getting version of FSR4 for their older architecture is imperative for that market segment. The Intel powered MSI Claw 8 is currently the only APU* with ML upscaler support via XESS & XESS 2.0. It runs the full version, not the full back verison that non Intel hardware uses.

*The Switch 2 has DLSS but PC Handhelds are in different market IMO.

EDIT: Daniel Owen dropped a video testing RDNA2 (6800XT)

Yeah, WMMA in RDNA3 was exactly what I was thinking of.

Saw that video earlier - don't remember that same scene with all the sparkling when he tested INT8 version on 7800XT had any...so it seems there is some difference how it behaves on RDNA3 vs RDNA2, although it's the same code.

I think we'll have to wait for a few days for more info, I'm guessing that FSR4 INT8 version is hot topic and that DF will be doing deep dive into it, with all the detailed comparisons.

And yeah, AMD should definitively release it officially - it seems they are skipping on RDNA4 for APU segment with everything they have on roadmap and sticking with RDNA3.5 in 2026 and going straight to RDNA5 and Zen6 in 2027.

Last edited by HoloDust - on 23 September 2025