[brazen1]

Your welcome folks, anytime.  Review those madVR setting pics again carefully.  Warner was kind enough to educate me so I updated two of them.  Please rep point him from time to time.  He deserves way more than he has and is as valuable an asset as assets come.  Yes, 8bit for everything until NVidia allows or enables 10bit exclusive setting just like 8 and 12 are now for RGB.  DCIP3 is the newest calibration setting that was provided for us.  Essentially, no displays are ready for BT2020 yet.  We can't possibly fill the spectrum of color it provides but it is part of the HDR spec for when we can.  You can calibrate to that setting but you will see a discrepancy and you can test it yourself various ways, so without going into information overload (which confuses me at times):

The reason I switched to this setting is because although HDR looked great in the past, SDR titles did not look as good as they could.  They lacked depth in color.  You could use BT.709 and both will look great but then your HDR BT.2020 title will extra process to BT.709 and why do it?  You can disable calibration and HDR will still look great but SDR won't.  It will lack depth in color.  Instead, I use the new calibration DCI-P3 which will advance into the future and it looks as good as it gets when using HDR and SDR which is perfect of course    Use pure power curve at 2.20.  You can change the 2.20 to any of the other ratios depending on your display and your viewing environment but you will probably end up back at 2.20 in the end.