Trouble getting 4k 120hz and 4:4:4 color profile working with my tv and pc
30 minutes ago, Invanaar said:
Ok, I need a sanity check please to see if I'm fucking up somewhere or missing something. I'm trying to get my Hisense U9DG TV working with my PC and it works as intended except that it will not let me choose 4k 120Hz, and 4:4:4 color space at the same time. I either have to bump it down to 8 bit and 4:2:2, or I have to bump it down to 4k 60hz. My PC is running windows 11 (I upgraded as a troubleshooting step) with an AMD CPU and a Gigabyte Windforce GTX 1080 GPU. I'm using a certified HDMI 2.1 cable and I made sure to plug it into the HDMI 2.1 port on the PC. Since the 1080 only had an HDMI 2.0b port, I have a DisplayPort 1.4 to HDMI 2.1 converter from Infinite cables plugged into the display port on my graphics card, which according to the spec sheet and sales team, should all work for this.Your message, b port, I have a DisplayPort 1.4 to HDMI 2.1 converter from Infinite cables plugged into the display port on my graphics card, which according to the spec sheet and sales team, should all work for this.
Now let me be clear, yea sure a 1080 isn't exactly going to be driving an HDR AAA title at 4k 120 hz. And similarly, the U9DG isn't amazing for gaming with its latency. But I just wanna make sure nothing is wrong before I leave the return periods of the TV, cables, and connectors, as well as gain a better understanding for what is wrong here.
DisplayPort can't run 4K 120Hz 4:4:4 bpc.
It is JUST barely enough to 4K 120Hz 4:2:2 bpc.
Not enough bandwidth.
Same goes for HDMI 2.0b; HDMI 2.0b has lower bandwidth than DP 1.4.
It can go 4K 60Hz 4:2:2.
Limitation is on the GTX 1080 and the HDMI / DP ports.
Unless Display Stream Compression (DSC) is supported...but I don't know if GTX 1080 supports DSC.
DSC is supported on the RTX 2000 series, according to nVidia.
It looks like starting with RTX 3000 series HDMI 2.1 was added and can support 4K 120Hz HDR.
DisplayPort is still 1.4.
RTX 4000 series updated to HDMI 2.1a, that can support 4K 240Hz.
Again DisplayPort remains 1.4.
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