Hi,
thank you for your comments.

- I tried different settings (e.g. Airfield details, trees etc.), and i tried different dates (my campaign tests all in 1915).
- My system is not throttling down, this happens when temperature is too high and my 2500k runs since years with about 55°C, thanks to my overkill cooler. Especially as the resolution change seems to have such a big influence on that, im sure this is more a graphics root cause than a CPU topic.
- No Mods installed, its a fresh WOFF UE over a fresh CFS3 installation.
- Idea with the AA enhance settings is good, i will have a look again at it.

But: All these points do not explain why im stuck at 15 fps, other times, im flying around with 90 fps (im always talking about WQHD 2560x1440 resolution). Even DCS which really asks intensively for CPU and GPU power runs perfekt over high crowded battlefields.

Makes no sense to me, i have never seen such a behaviour by any sim before.

I will do some further testings this week.

Want to start and play a campaign