Pimax Crystal - status, updates and fixes (Part 1)

I’ve split the image quality down into 3 parts.

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I heard Pimax mention the after sales Lenses so I’ve added them to the list along with the dock that come with the Crystal HMD.

I’ve not see a date for the sale of lenses or a price so I’ve marked them as red.
I’ve not seen the dock at the Roadshows or any mention that it a finished product so marked as red.

I’ll ask Pimax for clarification on both and adjust the chart when I get clarification.

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@hammerhead_gal

What’s the official Battery life of the controllers going to be?

Does the HMD have an official max battery life when in stand-alone mode?

Thanks

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Maybe add to your list:

AMD GPU Compatibility - No Official Announcement on website - Currently unknown

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Yes I will add that.

I’ve noticed Quest2 and Pico4 can do 72hz. I’ll add that as a refresh unknown for Crystal.

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I’m not sure so I will ask. Is Crystals display port 2.1?

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I heard it wasn’t. Forgot where that info came from tho.

A little math.
For the Display Port 1.4a. It can support up to 25.92 Gbps of data transfer.
Crystal is running at 2880x2880x2 = 16,588,800 pixels.
If pixels are 10bit HDR format then it will need 16,588,800 x 30 = 497,664,000 bits per screen.
So for 25.92 Gbps bandwidth we can see it can do 52hz of refresh rate.
Wait, only 52hz? How does it do 90hz or even 160 ? Now the great DSC is coming for rescue:
https://vesa.org/vesa-display-compression-codecs/
You can see that for 30bit color it can do 3.75 to 1 compression. So now 52x3.75 = 195 hz.
So theoretically with Display Port 1.4a, Crystal can go up to 195hz refresh rate with a single DP cable. Amazing, isn’t it?
How about 12k ? Well, I guess that 12k is actually 5760x2880x2. So DP1.4a can support up to 97.5hz. It’s not ideal, so either they need 2x DP cable, or use DP2.0. I think a 2x DP cable is the mostly likely solution.

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You forgot to add barrel distortion.

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I’ve updated the chart to include:-

GPU support - DSC
72hz refresh rate

Regions launched in China - US/EU RotW

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to the red price points for the lenses, you should write in green about it, “both lenses included in the package.” :wink:

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Yeah, I’ll modify that next time I’m on my PC.

The chart is more a status list than a spec list.

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I guess without Display Port 2.1 there will be no support for VRR or ALLM.

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No AMD support right now is a massive L in my book. The biggest L might I add.

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Hey @Atmos is Motion Reprojection support worthy of consideration to add to the list? it’s something that the Varjo Aero still hasn’t got yet afaik, could be a factor when choosing between the 2. btw i’m not sure Crystal has it either, I know the 8KX etc has it, would need to confirm with someone the Crystal has it if you decide to add it.

I’ve not seen any mention from Pimax yet of Reprojection.

I’ve updated the chart again tonight.

There was some confusion from the Roadshows as to which lenses were on display. Is this portion correct?

The larger FOV 35PPD were there?
The smaller FOV 42PPD were not there?

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Done. I rejigged the lens section.

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Yeah. And well, the wording that @Atmos used, it IMPLIES that AMD GPUs will be supported.
Official SOURCE please specifically stating for the PIMAX Crystal.

Else, we should not simply assume AMD will be officially supported by PIMAX for the Crystal.