These are the new calibration settings to get accurate color at the D65 white point in HDR in DCI-P3 and SDR using a spectrophotometer, colorimeter, Calman Ultimate, and a pattern generator for the best accuracy possible.
HDR Calibration
WITH HDR & AUTO HDR ENABLED IN WINDOWS!!!
1. Set 12bit RGB Full in Nvidia or AMD Control Panel.
SDR Calibration
1. Go to Settings, Picture, Preset: Standard
Brightness: 100
Contrast: 50
Sharpness: 5
2. Go to Color Temperature (Note panel variance means 100% accuracy between all panels may not be possible, but in my testing they are typically close).
Red: 100
Green: 95
Blue: 81
3. Install ICC Profile Below
4. Set 12bit RGB Full in Nvidia or AMD Control Panel.