[fswings]

@wrxtasy I think you should lower the GPU requirements for Intel to Nvidia GT 1030 2GB GDDR5 with Win10 only (don't know about win7).

I bought one and had no problem in enabling HDR playback via OS HDR setting with Kodi & dsplayer and separately using madvr for on the fly HDR change with Kodi & dsplayer + madvr. Played a whole host of 4k HDR rips (remuxes) with a range or average bit rates (45-85 Mbps) and different frame rates (23.976 and 59.94).

The video quality (with a lot of long back to back testing and getting a second opinion) was no different to built-in TV apps (via USB HDD and Plex). I want to emphasis playback was smooth even at 59.94 fps and peaking at 112 Mbps.

Easiest setup for 4k HDR playback is use Win10 and turn HDR & WCG on. Kodi 17.6 with dsplayer worked as expected. Downside is SDR content isn't as good nor if you use PC for other activities.

Option 2 is leave Win10 HDR setting 'off', and use madvr to handle the switch. I got the same playback using default settings (ie let madvr handle HDR pass through and *no* other madvr enhancements).

GPU was around 50% throughout and CPU was just tickled.

Setup:
LG OLED TV
GT 1030 2GB GDDR5
Win10 (Apr 2018) [New Install]
Madvr v0.92.14 (default settings - the same as using reset settings batch file)
Nvidia drivers 398.36 (2018-06-26)

If you're setting display refresh rate in Windows its 23Hz or 59Hz (round down), otherwise image will look choppy.

Source material:
4k blu-ray rips (remuxed in mkv), HEVC, 10 bit, HDR-10, 23.976 - 59.94 fps, average bit rates of 45 Mbps to 85 Mps.