I am using P3D on a GTX970 without a glitch.
I reinstalled FSX:SE when A320x was released and am suffering.
I am using the DX10 fixer and read the manuals and downloaded the FSLabs settings for DX10 fixer and NVI.
Whenever I pan in full screen mode within the VC I suffer distortion.
If I take a screenshot it does not appear - image is clean.
I used a external camera to give you the idea....
http://www.dropbox.com/s/0euyy3pjjyxwpir/IMG_2567.JPG?dl=0
My NVI Settings are here
http://www.dropbox.com/s/ranxxlhy67naynm/Screenshot%20%286%29.png?dl=0
http://www.dropbox.com/s/59054w48bz5vfcm/Screenshot%20%287%29.png?dl=0