I just got a r7 240 with the intent of driving a 4k display. Put it inside an athlon2 x4 system with my current 19x12 monitor and x11 was well...worse than a slideshow. Probably 30s full screen updates for switching desktops. Running arch linux. Will continue to look around to find out how to get manageable desktop performance. I just want to run this new monitor so I can work (code) on it!
No announcement yet.
AMD RadeonSI Driver 2D Performance Is Getting Better