Why i'm geting 30/40fps

i have a good pc with 8gb ram and 8 gb graphic card nvidia gtx 850m and i get 30 fps wtf
after the update this problem

My guess is UE4 decides to use low performace GPU in your laptop? look in logs or Window->Development Tools->Output Log, on top section of it hsould be info on which GPU UE4 is using

This is about what i get on my laptop with 16gb of ram and a 940m. You can go into the global settings and lower the editor settings to get more frames in the editor, I understand if you want fidelity over frames, but we cannot always have both on low budget systems.