Have a Acer XR341CK since "years" the settable color depth is wrong!
It is a fake 10-bit (8-bit + FRC dithering) Monitor.
In the Controll Panel i can set 12Bit!
With new Adrenalin 2019 driver VSR support should also come for 21: 9 monitor, but it is still not working
No support is show in the Controll Panel!
Edit:
Btw. the HDCP Status is also wrong it show always disabled, but the tests with Cyberlink blu-ray Advisor say HDCP is OK!
