Trox, have a look at the optimization thread by Adonis, it helped a lot of people.
I flew an hour yesterday on ATAG. I had 46 fps average and 10 fps min with max settings / original textures at 1920 x 1200. Slight stutter only when I zoomed a Blenheim - sorry Krupi again for overshooting you ...

- and clipped her wing. Afterwards I sighted an Hurricane giving a hard time to a Bf at deck, zoomed behind, fired from 100 to 50 m and saw her explode with cannon fire (100% M-Geschoss

).
Then came back and landed before the usual CTD. A wonderful sim time ...
I'm so sorry that the coding issues prevent a lot of people enjoying such a beautiful sim.
Cheers,
Ins