Here's something to try. I don't have any older games to test with and not sure if this will work.
Alternative to steps 1 & 2, type in devmgmt.msc in the search
Your screen will refresh and likely will not have the same resolution as you had before.
I'll give it a shot now... hopefully disabling the RX and a reboot will help.
By the way, where can I find the Intel graphics settings menu? There used to be a nice app with scaling options, but I cannot find it at the moment.
I noticed that too, when I disabled the Radeon - no display tool from Intel. I miss it on this platform.
Setting up a virtual machine might be another approach.
As for the Intel Display Tool - Intel or someone more "in-the-know" than I am, will need to respond.
Sorry to say, but there's no way to do this.
This NUC does not have the internal (Intel) Graphics hooked up to any outputs, it's use is pretty much limited solely to Intel(r) Quick Sync.
The only idea I have is uninstall the Radeon GFX driver and maybe they'll play on the Windows default GFX driver?
@ChrisV_Intel - this is so disappointing. My old NUC6i5SYK run perfectly on intel graphics. It is sad to see a premium NUC perform worst than the standard NUC.
@vvare But the NUC8i7HVK was just reviewed by PC World as the #1 gaming machine, in Australia. :-)
the larger review is here:
Noticeably absent from the 2019/2020 Intel line up, is the pairing of the Radeon/Intel graphics. It seems that relationship, for now, is over.
I don't need the Radeon either for my use cases, but for VR, likely necessary on this design.