Pimax To Showcase Its 8K Headset And New Controllers At CES 2019

Discussion in 'VR & Head-Mounted Displays' started by lostinseganet, Jan 9, 2019.

  1. lostinseganet

    lostinseganet [H]ard|Gawd

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  2. KazeoHin

    KazeoHin [H]ardness Supreme

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    They mentioned foveated rendering. This is GOOD.
     
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  3. Hagrid

    Hagrid [H]ardness Supreme

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    I wonder if they are using a 2080ti for the 8K? I believe I read that one problem was maintaining 90fps(or whatever is needed for this headset) but that was before the new gpu's were available.
     
  4. Supercharged_Z06

    Supercharged_Z06 2[H]4U

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    Hagrid, if you do the math, even a Titan RTX wouldn’t be enough to maintain 90fps if we are talking about a true 8K signal (4K per eye @90Hz).

    As the Pimax 8K is not a "true" 8K device due to bandwidth limitations as to what can be pumped across a single video cable, the Pimax 8K headset's input is limited to 2560×1440 for each of its displays. This is then upscaled in the headset to display on its screens at their native 4K actual resolution.

    So, the Pimax 8K just needs a card that can deliver two 1440p (2K) signals @ 90Hz each which is pretty much the equivalent of a 4K signal @ 90Hz.

    A single 2080Ti can manage 4K @ 60Hz but would be hard pressed to deliver 90Hz. A Titan RTX is only 10-15% faster, so also not quite up to snuff, but closer.

    As long as graphics are dialed way back and/or foveated rendering is used to ease the rendering burden, then a 2080Ti should be enough for a Pimax 8K with their upscaling tricks - odds are the are also not going to do true 90Hz from the source signal but something like 75Hz or some other wonky tricks to get close or simulate it.

    Right now, true 8k VR would require two 2080Ti’s at a minimum AND two video cable connections. The bandwidth of even the brand new VirtualLink connects couldn’t deliver what is required over a single connection as VirtualLink’s bandwidth for video is limited to only 32.4 Gbit/s... so it’ll handle up to 4K @ 120 Hz at best. At 8K the best it can deliver is 60Hz.

    So for true next gen 8K VR, the real limitation here is the video channel throughput. What we need is HDMI 2.1 - something that NVidia hasn’t adopted just yet as it was just ratified. They should on thier next gen cards though... or with their 7nm Turing die shrink later this year. Unlike VirtualLink’s 32.4 Gbit/s, HDMI 2.1 can handle up to 48 Gbit/s as to bandwidth, and with display stream compression it’s good for 8K @ 120 Hz.
     
  5. Hagrid

    Hagrid [H]ardness Supreme

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    I do not know what tricks they use or whatever, but it did run at the native 4K per eye but could not maintain it. So whatever they did, it ran but not high enough.
    The math is good if you know exactly what they are doing and how they are doing it. I know neither. Just from what I read on their testing.
     
  6. Supercharged_Z06

    Supercharged_Z06 2[H]4U

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    WUT? Did you not read my post? Native 4K per eye @90Hz requires a 8K signal @90Hz. They are not displaying a native 4K signal per eye from source. They are simply upscaling. They even admit that they are upscaling. It’s only 4K across both eyes, not per.
     
  7. Hagrid

    Hagrid [H]ardness Supreme

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    Ahh. It's the Pimax 8K X that I was reading about.
     
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  8. XoR_

    XoR_ Gawd

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    I like how these controller looks. Very similar to Oculus Touch which I like very much!

    What I do not like is using LCD's in there. They do have Pimax 4K BE model which seems the best because of OLED screen. Also normal 5K version seems better than 8K with upscaling. I hate upscaling
    On the other hand 200 degree FOV kinda demands at least 4K, native and preferably with eye trackign for foveated rendering.

    Right now these things are ridiculously expensive.

    One 4K screens per two eyes adds up to half-8K, not real 8K which is like 4 x 4K screens.
     
  9. Youn

    Youn [H]ardness Supreme

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    4 or 8K = 4 or 8 thousand pixels wide respectively, aspect ratio notwithstanding, so...

    2x 4K = 8K if you stack the two 4K displays side-by-side... if they are on top of each other it remains 4K... :p
     
  10. Vega

    Vega [H]ardness Supreme

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    Ya I have the 8K-X on order. This is two 4K displays side-by-side at 90 Hz (8K width, but only half 8K height).. So it would be half the bandwidth of an 8K display at 90 Hz. "8K" resolution is very high, exactly four times the resolution of 4K. 8.2m pixels versus 33.2m pixels.
     
  11. funkydmunky

    funkydmunky 2[H]4U

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    What is the best place to keep up with the latest VR news? I am craving real comparisons and breakdowns. I just find fluff and recycled press releases. I need benches, numbers. [H] I hope you jump into VR in a big way.
     
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  12. Vega

    Vega [H]ardness Supreme

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  13. Creig

    Creig Gawd

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    I wonder if the 16 GB of memory running at 1 TB/s bandwidth on the Radeon VII will lend itself to boosting VR framerates on high resolution headsets like the Pimax units. Would it be the GPU processing speed that is currently the bottleneck or is it memory bandwidth?
     
  14. Supercharged_Z06

    Supercharged_Z06 2[H]4U

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    It's definitely the GPU processing. GDDR6 / HBM2 have plenty of needed bandwidth.
     
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