I recently upgraded to a Asus R9 390 and added a second VG248qe monitor and now have some strange blocky and wavy pixelation on background images and in game on both monitors including the one i had originally with no change in cables or settings. Removed all drivers with DDU and installed new ones, checked cables, checked seating. Don't know where to go from there without RMA and I don't want to do that unless I have to. Running DVI at 144hz on original and ran an HDMI for the second until my two displayport cables arrive. Color depth is set to 32. At 16 you can really see the artifacts.
Pictures
Pictures