Current Generation Hardware Speculation with a Technical Spin [post launch 2021] [XBSX, PS5]

Discussion in 'Console Technology' started by pjbliverpool, Feb 9, 2021.

  1. iroboto

    iroboto Daft Funk
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    SSD is critical. I/O memory is the slowest part of the pipeline for just about a lot of things. Compute moves a significant pace faster than bandwidth, so often compute is sitting idle.
    Moving up SSD and ideally increasing bandwidth were an absolute critical portion of moving forward into the future.
     
  2. PSman1700

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    Everything had to align, faster nvme, faster cpu, faster gpu etc etc
     
  3. rabbit

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    Do you think ps5 has functions similar to sfs?
    If yes, why does ps5 need such ssd speed?
    And if not, it could actually have a significant impact on the difference in picture and performance between consoles.
     
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  4. invictis

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    I'm sure it has something akin to Sampler Feedback, but not Sampler Feedback Streaming.
    I'm not sure it will have much of an impact on the quality of graphics or textures, but should just make RAM usage more efficient.
     
  5. rabbit

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    It depends on how hardware support for ML, VRS, Mesh Shaders and SFS will affect the difference in performance between consoles. And on how multiplatform developers will use it.

    Also, we do not know how much the ps5 GPU frequency drops when the CPU is used at full throttle. And how multiplatform developers will use Smart Shift.
    According to Mark Cerny, they could not get the GPU to run stable at 2.0 Ghz and the CPU at 3.0 Ghz at the same time.
    + There was a questionable leak, which may well be close to the truth:
    [​IMG]
     
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  6. snc

    snc
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    lmao, its from xbox discord and has nothing to do with truth ;d
     
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  7. Rurouni

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    If that is correct then I don't even want to know what XSX actual clock speed since its performance is similar to PS5. Yes, XSX clock is fixed, thus making that post questionable.
    Also "According to Mark Cerny, they could not get the GPU to run stable at 2.0 Ghz and the CPU at 3.0 Ghz at the same time."... I don't remember Cerny said something like that. Is there a source for this?

    edit: just think for a moment.... If XSX can run at 3.6 1.8 at fixed clock, why PS5 need to smart shift to 3.2 1.8? Why 3.5 1.2?

    OT
    This is why I posted here less. there is too much noise because of the console launch. Even if there was a post like this, nobody will like that post because it is questionable, but here we are, someone actually like that post. I just don't understand
     
    #267 Rurouni, May 5, 2021 at 1:04 PM
    Last edited: May 5, 2021 at 1:21 PM
  8. Karamazov

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    They can both run at max freq during normal usage, smartshift is here to downclock one or the other when not fully used to reduce power usage.

    In worst case scenario when the power eveloppe is exceeded it will downclock.
    On the XsX side since it can't downclock it will throttle.
     
    #268 Karamazov, May 5, 2021 at 1:35 PM
    Last edited: May 5, 2021 at 2:11 PM
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  9. Silent_Buddha

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    Since we're still new to the generation and most titles are still cross-platform, it's unknown what normal usage will be like over the course of the generation.

    More accurate to just say that as long as a game's code doesn't cause the PS5 to exceed it's power limit then it can operate at max frequency. However, if power use exceeds the limit then one or the other will have to downclock.

    The hope here is that this will encourage developers to find more power efficient versus time efficient ways of doing things. But if a developer wants or needs to really push either the CPU or GPU, they have that option if they don't mind reducing the frequency of the GPU or CPU.

    Regards,
    SB
     
  10. Jay

    Jay
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    Could you dig up where you heard that?

    As far as I'm aware, I don't remember xbox ever saying it will throttle.
    I.e. If it can't run at its fixed frequency for some reason then it's operating outside of its window, and will probably exit game or shut down.
     
  11. iroboto

    iroboto Daft Funk
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    It can downclock. But only does so when there is nothing happening to save on power.

    As per downclocking under load, it would shut down before doing that IIRC. Just like all other consoles. Just expect your XSX to get really hot first.
     
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  12. Allandor

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    Sry, it is not exact enough. Smartshift is there to reduce the power envelope of one component and deliver the power to the other. So the soc has more or less a stable power envelope. Only if both would be idle most of the time, power will be saved. This is also what we've seen so far in power-consumption tests. PS5 is more or less stable in the ~200W area while xbox series x in a 150-175W area but it can go up to over 200W (I think gears was one of those games).
    But the data is a bit incomplete so far, because power consumption tests are not done so often. @Dictator you and your team should really add this to multiplattform tests.
     
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