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!
Btw. the HDCP Status is also wrong it show always disabled, but the tests with Cyberlink blu-ray Advisor say HDCP is OK!