I had to change both....
# internal rendering resolution of the game
# higher values will decrease performance
renderWidth 5760
renderHeight 1080
# The display width/height
# 0 means use the same resolution as renderWidth/Height
# (use for downscaling - if in doubt, leave at 0)
presentWidth 5760
presentHeight 1080
Now its working and I am loving it.
# internal rendering resolution of the game
# higher values will decrease performance
renderWidth 5760
renderHeight 1080
# The display width/height
# 0 means use the same resolution as renderWidth/Height
# (use for downscaling - if in doubt, leave at 0)
presentWidth 5760
presentHeight 1080
Now its working and I am loving it.