Wow showed up.
Sorry for my wrong assumptions.
However I’m getting even more interesting results. My specs are GTX1080, i7-6700K @ 4.5G, and I can get ~31fps (probably capped) from the prebuilt version from the launcher. However, when I download the project (4.15) and make a shipping build I can get only ~5fps in an open view 
I set all the scalability settings to low (using a DefaultGameUserSettings.ini) and the fps was not improved at all…