http://i.imgur.com/zgcPmme.jpg
Heavensward currently works at DX9, but will crash instantly if switched to DX11. Very weird since I played on DX11 for a solid hour this morning at launch.
Also, DX9 can only be played in Borderless Windowed or Windowed. If Fullscreen within DX9 and alt-tab occurs, the screen will go blank and Final Fantasy in task manager will say "Not Responding".