Turning on HDR in Windows makes it dim

[kingmustard]

I have a Gigabyte AD27QD monitor (HDR400-compliant), an RTX 2080 (latest drivers) and Windows 10 (May 2019 Update).

 

When I go to Settings > System > Display > Windows HD Color and turn on 'Play HDR games and apps', Windows goes very dull.

 

My monitor's brightness is already at 100% and adjusting the 'SDR content appearance' slider in the Windows HD Color dialog washes everything out even further.

 

Games like Metro Exodus only display the HDR setting in-game if 'Play HDR games and apps' is enabled in Windows.

 

Games themselves do not look dull with 'Play HDR games and apps' enabled (whether HDR is enabled in-game or not).

 

I have the monitor running in RGB output color format/ Full dynamic range/ 10 bcp output color depth in the NVIDIA Control Panel.

Any ideas?

[TheBean]

is the monitor running in sdr from the osd settings?

Edited June 25, 2019 by Saksham

[kingmustard]

11 hours ago, Saksham said:

is the monitor running in sdr from the osd settings?

Nope, I've since discovered this is a PC platform limitation. Shame.