Windows 10: Can’t clone HDR monitor to 4K capture card on 2nd pc

I’m trying to setup a 2 pc system for streaming. My gaming monitor is HDR 4K 144hz, and I’m trying to clone that to a 4K capture card on my 2nd pc. When I clone the gaming monitor #1 to the capture card monitor #2, hdr is automatically turned off the gaming monitor. The cloned image will successfully show on the capture card, but I would like to obviously keep hdr on the main screen. Windows and hardware drivers for all components are up to date.

:)

 

Windows wont display 4k and HDR simultaneously.

I recently got a 4k HDR tv (Samsung UE43NU7100). I connect my PC with a normal HD monitor and the 4k HDR tv. When turning on HDR on my tv the resolution of the 4k tv (3840x2160) gets set back to normal HD (1920x1080) in windows settings. Windows is completely
updated, my AMD Radeon R9 390 8gb graphics card is up to date and supports and displays in 4k when HDR is off. My Xbox one X displays both 4k and HDR perfectly simultaneously. I use a high speed HDMI 2.0 cable. I have no idea why my pc does this and cant find
anything about windows not being able to do 4k and HDR at the same time. It also doesn't work if I only connect the tv instead of the monitor and tv. Any suggestion?

 

Display Cloning in HDR: Possible?

screen duplication with HDR will need other screens capable but the video card may not be capable

 

Video Card/HDR/4K Questions

HDMI 1.4a won't support 4k at 60 Hz. It may at 30Hz, but I can't recommend that.

DisplayPort 1.2 can do 4k/60Hz.

Both of those are mostly irrelevant if you use an add-on graphics card.

HDR is another matter.

Here's a list of graphics cards that supposedly support HDR: What graphics card do I need for HDR and what PC games support it? | Rock Paper Shotgun

I presume that the current generation of cards (nVidia RTX 30X0, AMD Radeon RX 6X00) also have it.

One of my desktop PCs uses an nVidia Titan X (Maxwell) card, basically a GTX 980ti with more VRAM. With recent drivers, it supports HDR at 4k/60Hz via DisplayPort. (I think that irt would not via HDMI.)

Whether your old PC (2013) is powerful enough to make 4k/HDR usable, I have no idea. May be OK for other things than games.

If you wish to watch UHD BluRay movie disks on the PC, that opens another can of worms. The only normally supported configuration that I know of requires a CPU and motherboard that support the Intel SGX instructions. Cannot Enable Intel(R) Software Guard Extensions (Intel(R) SGX) Using... An alternative would be to use an optical drive with a hacked firmware and player software like DVDFab Player. (From China.) It's practically a whole hobby in itself.