The stuttering is probably the compatibility layer, it doesn’t do it in helldivers, for instance. So I think it’s game specific
Thanks for the Hdr link. I have enabled it for desktop but didn’t realize steam was different.
For the brightness, HDR is enabled, but it seems like it “forgets” what brightness is supposed to be until I wiggle the slider. And every time I boot the pc the brightness needs to be at a different number to match my non HDR monitor. Probably just growing pains with a beta feature, I would guess.