USB-C to 4k 120hz HDMI (or HDMI 2.1)

Updated 7 days ago in Adapters and Cables
18 on 16-06-2020

I’m really excited about the new CAC-1085 (DisplayPort to 4k 120hz HDMI adapter) that just came out. Are there plans to make a USB-C to HDMI version for laptops with Ice Lake graphics?

 
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0 on 16-06-2020

Just looked at the catalog — it looks like the CAC-1585 will be the product. Any thoughts on when this will come out?

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3 on 17-06-2020

Just came out where?

on 18-06-2020

https://www.club-3d.com/en/detail/2496/displayport_1.4_to_hdmi_4k120hz_hdr_active_adapter_m-f/

on 18-06-2020

I thought you meant it was available for purchase. It’s not available yet

on 18-06-2020

End of the month, so soon enough? Anyway, still wondering more about the CAC-1585!

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1 on 20-06-2020

This says something about compression. You can’t get a true 4K 120 Hertz at 10 bit. You can however get 98 hz. I hope they haven’t compressed the signal

on 20-06-2020

Yes, you need DSC (display stream compression) to get beyond [email protected]@8bit or to get to [email protected] DSC should be visually lossless though, and I’m curious to see proof of it.

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8 on 20-06-2020

No compression is 444

on 20-06-2020

4:4:4 is referring to the chroma sampling. DSC is totally different. All of the resolutions I mentioned would be at 4:4:4.

on 21-06-2020

any type of compression is going to reduce quality. And yes I could tell the difference between 8-bit 4K 120 and 10-bit 4K 98

on 26-06-2020

You should do your research on DSC, and maybe compression algorithms in general, before making any judgments on compression quality. It’s totally orthogonal to chroma sub-sampling, bit depth, and frame rates.

Anyway, back to my original question, @MST1407, any indications as to when the CAC-1585 might come out?

on 26-06-2020

Compression vs raw?

on 26-06-2020

It’s not too much research needed

on 02-07-2020
any type of compression is going to reduce quality. And yes I could tell the difference between 8-bit 4K 120 and 10-bit 4K 98From net200777

You cannot tell the difference between 8-bit with dithering YCbCr444 / RGB and 10-bit YCbCr444 / RGB in either HDR or SDR. However with YCbCr422 / YCbCr420 subsampling, you cannot use dithering and must use 10-bit for HDR.

1 week ago

the CAC-1585 will have a later delivery time – around end of August 

just curious what system do you want to connect it to? There arent that many USB C DisplayPort 1.4 Alt Mode solutions out there 

7 days ago

Thanks for the info! I was thinking that this adapter is targeted more at laptops that only have USB-C and no DisplayPort ports. Ice Lake supports DSC and DisplayPort 1.4, but I haven’t seen any info about Alt Mode. Tiger Lake is also coming out soon (probably similar August timeframe).

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1 on 28-06-2020

Well it’s the end of the month, where is it?

 

on 02-07-2020

Well it’s the end of the month, where is it?

 

From Pittyh

Looks like it’s available at alternate.nl, but it hasn’t made it to other countries yet (as of today).

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