http://support.amd.com/en-us/download/desktop?os=Windows+10+-+64
I don't pretend to know if this actually helps anything for benchmarks, but there's one important thing here:
Custom Resolution Support:
This feature provides users more control over display capabilities allowing the user to create custom display profiles to attempt to drive their display with chosen resolution, timings, refresh rates and pixel clocks.
in other words, now you don't need a program like CRU anymore, it's a native thing