Referencing this 2015 thread. I have some HP t620 Thin Clients, which has in built AMD Radeon HD 8330E graphic.

There are two DisplayPort 1.2 it means it supports max 3840x2160 pixels with refresh rate 60Hz, or at least 2560x1600 as per technical specification.

Our goal is use Dell U3415W curved monitor with two systems, one with thin client resolution 1600x1200 and other with second system. We have tested with in built AMD mentioned above video driver its not working but when we uninstall AMD driver and use Microsoft windows basic display driver it works as expected, but my question is why its not working with AMD? If we use basic display driver I think we won't get better result and performance. 

Thanks in advance!