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TimSweeneyEpic's profile
Tim Sweeney
Tim Sweeney
Tim Sweeney
@TimSweeneyEpic

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Tim Sweeney

@TimSweeneyEpic

Epic Games founder & CEO

epicgames.com
Joined August 2013

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    1. TheCR04‏ @TheCR04 May 13
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      @TimSweeneyEpic can you please specify how exactly the PS5's "Better than high-end PCs" storage is not just a PCIE 4.0 NVMe SSD?

      2 replies 1 retweet 7 likes
      Tim Sweeney‏ @TimSweeneyEpic May 13
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      Replying to @TheCR04

      See the coverage of Mark Cerny's talk for technical details. The software and hardware stack go to great lengths to minimize latency and maximize the bandwidth that's actually accessible by games. On PC, there's a lot of layering and overhead.

      2:10 PM - 13 May 2020
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      7 replies 21 retweets 102 likes
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        2. Tradition‏ @traditionvr May 14
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          Replying to @TimSweeneyEpic @TheCR04

          I've seen this myself. My brother as a PCIe 4.0 M.2 board with 4x Samsung NVMes plugged in connected as one drive over RAID 0. Sequential read speed is a staggering 12+GB/s. Random read speeds are laughably bad, still. A lot of IO overhead on PC architecture still.

          1 reply 0 retweets 2 likes
        3. Tim Sweeney‏ @TimSweeneyEpic May 14
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          Replying to @traditionvr @TheCR04

          Then you have the issue of getting compressed textures into video memory requires reading into RAM, software decompressing, then calling into a GPU driver to transfer and swizzle them, with numerous kernel transitions throughout.

          2 replies 4 retweets 29 likes
        4. 2 more replies
        1. Billy Yost‏ @wvubkball May 15
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          Replying to @TimSweeneyEpic @TheCR04

          Wouldn’t it also be due to a high speed gpu up around 2.23 ghz allowing fast rasterization?

          0 replies 0 retweets 0 likes
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        2. Cameron Standring‏ @BreakAtmo May 13
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          Replying to @TimSweeneyEpic @TheCR04

          It's primarily the hardware and software I/O setup, right? I remember he said you'll be able to use off-the-shelf SSDs as well because they'll work with the I/O, but they need to be about 7GB/s due to the lack of priority levels.

          1 reply 0 retweets 1 like
        3. Kayama‏ @Kayama_Yuuichi May 13
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          Replying to @BreakAtmo @TimSweeneyEpic @TheCR04

          And don't forget all the different hardwares in the custom I/O complex that will be help reduce latency, its not just about priority levels.

          1 reply 0 retweets 0 likes
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        2. Tyler Pickney‏ @tyler_pickney May 14
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          Replying to @TimSweeneyEpic @TheCR04

          What would we gain/lose if this same demo ran on Series x?

          1 reply 0 retweets 0 likes
        3. John Lazo‏ @JEREMIH_RAIDEN May 15
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          Replying to @tyler_pickney @TimSweeneyEpic @TheCR04

          if you watch the demo, they stated that they were streaming in polygons as the camera pans. which means the series x's half bandwidth could struggle streaming, but they have the TFLOPs to make it up but wont be able to stream as high fidelity as the PS5 from the SSD,

          0 replies 0 retweets 2 likes
        4. End of conversation
        1. Samuel Pelletier‏ @SamPelletier98 May 13
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          Replying to @TimSweeneyEpic @TheCR04

          So basically from what I understand it's not the ssd itself but rather the implementation and optimisation able because you're using specific hardware compared to pc being able to accept multiple hardware from different sources ?

          0 replies 0 retweets 6 likes
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        1. Gamer1988‏ @GamerGB1988 May 14
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          Replying to @TimSweeneyEpic @TheCR04

          Well currently, PCs do not have the compression I/O techniques like consoles. With the direct storage API however, that woull change.

          0 replies 0 retweets 0 likes
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