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AMD Radeon RX 7900 XTX & RX 7900 XT Arrive For Linux Testing

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  • #41
    Originally posted by Quackdoc View Post
    Fingers crossed for good RT,
    Another one…


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    • #42
      Originally posted by NeoMorpheus View Post

      Another one…

      well yeah, RT looks really good in games. and can present very fun stealth mechanics.

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      • #43
        Originally posted by Quackdoc View Post
        Fingers crossed for good RT,
        From Anandtech's coverage of their launch event:





        "AMD’s own performance slides tout anywhere between a 47% and 84% increase in RT performance.
        Though it should be noted that AMD’s numbers are with FSR enabled;
        so we cannot divorce these gains from any changes that improve FSR performance on the 7900 XTX."


        OMG, I just noticed that diagram shifted the baseline of the new gen scores by using perspective and pushing them back in the frustum. Wow, that's really sketchy.
        Last edited by coder; 09 December 2022, 03:24 AM.

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        • #44
          Yesterday I checked the ROCm-5.4 code base, and found RDNA3 already got supported in several math libraries like rocBLAS, rocFFF, etc. MIOpen not supported. Is it possible to run some ROCm benchmarks? @Michael

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          • #45
            This cards look sick, can't wait to see how good (or not) the Linux support is to buy one.

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            • #46
              Originally posted by coder View Post
              From Anandtech's coverage of their launch event:





              "AMD’s own performance slides tout anywhere between a 47% and 84% increase in RT performance.
              Though it should be noted that AMD’s numbers are with FSR enabled;
              so we cannot divorce these gains from any changes that improve FSR performance on the 7900 XTX."


              OMG, I just noticed that diagram shifted the baseline of the new gen scores by using perspective and pushing them back in the frustum. Wow, that's really sketchy.
              The outlook for RTRT on AMD looks even dire than I thought:

              If their own numbers are confirming that they are unable to achieve atleast a 2× jump in performance without FSR, then what this means in practice is that Portal RTX will atmost deliver 2 FPS instead of 1 FPS @ 4K as is the case for the current top-end 6900 XT right now.

              Truly remarkable...

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              • #47
                Originally posted by Linuxxx View Post
                The outlook for RTRT on AMD looks even dire than I thought:

                If their own numbers are confirming that they are unable to achieve atleast a 2× jump in performance without FSR, then what this means in practice is that Portal RTX will atmost deliver 2 FPS instead of 1 FPS @ 4K as is the case for the current top-end 6900 XT right now.
                Maybe Portal RTX is tickling a bad case in AMD's driver? In that case, some driver optimizations could go a long way.

                In general, it's clear that AMD opted not to try and compete with Nvidia on ray tracing performance, which was probably a wise move. They wouldn't have beat Nvidia, and yet it would've come at the expense of considerable amounts of conventional rasterization performance or die area.

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                • #48
                  Originally posted by Danny3 View Post

                  But VRR is not working, right?

                  The GPU and TV always work at 120 Hz, even for movies or games that doesn't reach such a high framerate?
                  yes, vrr is

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                  • #49
                    Originally posted by Linuxxx View Post

                    The outlook for RTRT on AMD looks even dire than I thought:

                    If their own numbers are confirming that they are unable to achieve atleast a 2× jump in performance without FSR, then what this means in practice is that Portal RTX will atmost deliver 2 FPS instead of 1 FPS @ 4K as is the case for the current top-end 6900 XT right now.

                    Truly remarkable...
                    Seeing as it's a title where AMD performance is clearly being crippled deliberately, I don't think Portal RTX numbers are particularly relevant.

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                    • #50
                      Originally posted by coder View Post
                      Maybe Portal RTX is tickling a bad case in AMD's driver? In that case, some driver optimizations could go a long way.
                      Portal RTX was written by NVidia, and as such it's almost certainly designed in such a way to take advantage of NVidia GPU features in a way that will be difficult for AMD to match. That's kind of the main point of releasing it, the same way that they designed things like NVidia HairWorks to perform poorly on amd cards back when they weren't very good at tessellation.

                      That said, it's clear at this point that AMD is way behind on raytracing even without any dirty tricks from nvidia, and while i thought focusing on that was a little silly for the last 2 generations while most games didn't really do much with raytracing that wasn't gimmicky, it's starting to become more of an issue. I still don't think it's at the point where it matters that much yet, but I'm not so sure it will remain that way over the next couple of years, and that starts to matter more now with the new generation of cards.
                      Last edited by smitty3268; 10 December 2022, 02:48 AM.

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