Using crossfire with the R9 295x2 in windows 10 makes cod AW laggy and most maps don't load. Turn it off and all games run at solid 91 fps apart from the map Drift and Recovery which stutters for about a minute before going smooth.
The game just doesn't work with crossfire enabled. Low fps in every game no matter the settings or resolution. same fps at 600 x 800 as 4k VSR. It fluctuates from 70 fps down to 30 fps and mostly stutters.
This has been doing this with all windows 10 drivers for me.