maxik@m-Gentoo-PC ~> cat /etc/X11/xorg.conf.d/20-radeon.conf 
Section "Device"
    	Identifier "R7 370"
    	Driver "radeon"
	Option "ColorTiling" "on"
	Option "ColorTiling2D" "on"
	Option "DRI" "3"
	Option "AccelMethod" "glamor"
EndSection