Horrible performance with trees

On my crappy old laptop:
when i open the simple third person template in Unreal Engine 4.15 preview1 i got 9 Fps onlyyyy (High Settings)! (Only the Manequin model and some Boxes around)!!
In Cryengine 2 Sandbox Editor when i open the complete Island Level from Crysis 1 Game (With hundreds of Trees,objects,particles,Ocean,Volumetric Clouds,Textures,et.also (High Settings)…i get 25 Fps!!!Whoah