Low fps on laptop

I have low fps and lagging game . My laptop is this : Radeon hd6770m(2 gb) + i5 2.40 ghz + 8gb ram.
I can play but with boring lagging (it is not multiplayer mode) ,also with the lowest settings . Anyone can help me?
PS : in the graphic options the game says that it uses my integrated card (Intel hd3000) but I set high performance card on the Radeon control panel , so I don’t understand why.

I think that I will refund xD

I had to go into my bios and disable the internal card and just use my Nvidia from that point forward. That’s what worked for me on my Alienware