Low FPS and frame rate drops on new laptop

i7 5500U 2.4 Ghz with HD 5500 and AMD R9 M275X.
I have set everything to low and done ini hacks and all kinds of stuff but I can’t get more than 50 FPS ANYWHERE. I have seen computers much older than mine run BL2 just fine and mine just won’t work.

It wouldn’t be so bad at a constant 45 or so, but there are also awful frame rate drops when walking to different places to 20 or lower. I have updated my drivers.