Current Generation Hardware Speculation with a Technical Spin [post GDC 2020] [XBSX, PS5]

Discussion in 'Console Technology' started by Proelite, Mar 16, 2020.

Thread Status:
Not open for further replies.
  1. tunafish

    Regular

    Joined:
    Aug 19, 2011
    Messages:
    622
    Likes Received:
    403
    I think that ~22GB/s is the throughput of the link that connects the decompressor to main ram. That speed would be achieved when decompressing things that have very low entropy. Since the output of the decompression is formats directly fed to the GPU, such data does actually exist, even if it's a small portion of the total data. 2:1 is probably closer to what they expect typical content to compress to.

    Power = current*voltage. 198 amps * 1.32V is only 261W.
     
    ethernity likes this.
  2. Love_In_Rio

    Veteran

    Joined:
    Apr 21, 2004
    Messages:
    1,627
    Likes Received:
    226
    15% from IPC, IIRC it was in some slide.
     
  3. iroboto

    iroboto Daft Funk
    Legend Regular Subscriber

    Joined:
    Mar 6, 2014
    Messages:
    13,680
    Likes Received:
    16,902
    Location:
    The North
    oh snap!
    thanks mate haha.

    I can't believe I didn't think of doing a simple equation to work that out.
    Insane number of amps pumping there
     
  4. RobertR1

    RobertR1 Pro
    Legend

    Joined:
    Nov 2, 2005
    Messages:
    5,837
    Likes Received:
    1,264
    9900k's oc'd draw a lot of power. With that said, you should look at some HEDT chips OC'd...
     
  5. iroboto

    iroboto Daft Funk
    Legend Regular Subscriber

    Joined:
    Mar 6, 2014
    Messages:
    13,680
    Likes Received:
    16,902
    Location:
    The North
    haha yea man it's nuts how much a piece of silicon can handle
     
  6. anexanhume

    Veteran Regular

    Joined:
    Dec 5, 2011
    Messages:
    2,078
    Likes Received:
    1,535
    Someone claimed to have heard 15%, but it was never backed up. That’s the last I remember.
     
  7. tinokun

    Newcomer Subscriber

    Joined:
    Jul 23, 2004
    Messages:
    70
    Likes Received:
    87
    Location:
    Peru


    James Stanard answered a few things:





    Long explanation of sampler feedback:

    https://twitter.com/JamesStanard/status/1241061511071596544
    https://twitter.com/Remij010/status/1241104425143259136
    https://twitter.com/JamesStanard/status/1241105373735432192
    Remij010 then asked "Just to be clear, what I meant wasn't that SFS (and XVA features) were a part of RDNA2 on PS5.. but rather RDNA2 from a hardware standpoint could support those features on PS5.. should Sony expose them. It's not a component in hardware exclusive to Series X, right?"
    Unfortunately no answer.

    About BCPack:

    https://twitter.com/JamesStanard/status/1241076025477357568
    A little about audio:

    https://twitter.com/PresskottCore/status/1241112536780546048
    https://twitter.com/JamesStanard/status/1241113225757724672
     
    AzBat, DSoup, Silent_Buddha and 7 others like this.
  8. iroboto

    iroboto Daft Funk
    Legend Regular Subscriber

    Joined:
    Mar 6, 2014
    Messages:
    13,680
    Likes Received:
    16,902
    Location:
    The North
    There seems to be some misinformation in there for sure.
    DX12U supports SFS.
    RDNA 2 and Turing are announced to be DX12U.

    So the hardware and software stacks have to be supported by both.
    Unless they are supported only by software, and the XSX supports it in hardware.

    XVA cannot be an extension of HBCC. Which is what I thought it was earlier. If it was HBCC, it can't be on Turing.

    We need more information on this, something is amiss.
    edit: nvm, the XVA is a mixture of DX12U and 2 hardware components. The 2 hardware components are specific to XSX, but not specific to DX12U
     
    #688 iroboto, Mar 21, 2020
    Last edited: Mar 21, 2020
  9. PSman1700

    Legend Newcomer

    Joined:
    Mar 22, 2019
    Messages:
    5,402
    Likes Received:
    2,377
    Nice post with all the sources applied. Still some form of secret sauce this gen with the audio and BCpack thingys ;) The memes are lol down those twitter posts, wont link to them, they dont belong here :p
     
  10. bgroovy

    Regular Newcomer

    Joined:
    Oct 15, 2014
    Messages:
    799
    Likes Received:
    626
    This guy is just wrong. The BCPack compression is already factored into the figures MS has provided for decompressed throughput.

    I don't think this logically follows. There's no reason nVidia can't have implemented similar features in their own hardware.
     
    disco_ likes this.
  11. iroboto

    iroboto Daft Funk
    Legend Regular Subscriber

    Joined:
    Mar 6, 2014
    Messages:
    13,680
    Likes Received:
    16,902
    Location:
    The North
    they would have talked about it back when Turing was announced. I just think it’s highly unlikely.
    But HBCC was on a Radeon 7, and it doesn’t support DX12U or SFS. And neither does RDNA1.
    Texture space shading on Turing though.
     
    #691 iroboto, Mar 21, 2020
    Last edited: Mar 21, 2020
  12. psorcerer

    Regular

    Joined:
    Aug 9, 2004
    Messages:
    732
    Likes Received:
    134
  13. iroboto

    iroboto Daft Funk
    Legend Regular Subscriber

    Joined:
    Mar 6, 2014
    Messages:
    13,680
    Likes Received:
    16,902
    Location:
    The North
    PSman1700 likes this.
  14. Jay

    Jay
    Veteran Regular

    Joined:
    Aug 3, 2013
    Messages:
    3,706
    Likes Received:
    3,069
    Dolby response regarding Cerny's comments about Atmos limitations
    https://developer.dolby.com/blog/spatial-audio-and-the-ps5/

     
  15. Scott_Arm

    Legend

    Joined:
    Jun 16, 2004
    Messages:
    14,858
    Likes Received:
    7,135


    @psorcerer Sampler Feedback is a hardware feature.
     
  16. psorcerer

    Regular

    Joined:
    Aug 9, 2004
    Messages:
    732
    Likes Received:
    134
    Not convinced. I've read the whole whitepaper and don;t see what hardware support is needed.
    Apart from the RDNA2 chip (if you are on AMD)
     
    egoless likes this.
  17. Scott_Arm

    Legend

    Joined:
    Jun 16, 2004
    Messages:
    14,858
    Likes Received:
    7,135
    So how would this work on a pascal or rdna1 gpu?
     
  18. Scott_Arm

    Legend

    Joined:
    Jun 16, 2004
    Messages:
    14,858
    Likes Received:
    7,135
  19. psorcerer

    Regular

    Joined:
    Aug 9, 2004
    Messages:
    732
    Likes Received:
    134
    I'm not sure what are you asking?
    SFS relies on TSS, which is a hw feature present in Turing and RDNA2 (i.e. XSeX and PS5).
    SFS itself is a software thing.
     
    RagnarokFF likes this.
  20. Scott_Arm

    Legend

    Joined:
    Jun 16, 2004
    Messages:
    14,858
    Likes Received:
    7,135
    Ok ... so we agree, it is a hardware feature? You need the TSS hardware to do SFS ... so it's a hardware feature.
     
    PSman1700 likes this.
Loading...
Thread Status:
Not open for further replies.

Share This Page

  • About Us

    Beyond3D has been around for over a decade and prides itself on being the best place on the web for in-depth, technically-driven discussion and analysis of 3D graphics hardware. If you love pixels and transistors, you've come to the right place!

    Beyond3D is proudly published by GPU Tools Ltd.
Loading...