GT650M Lagging when it shouldn't

KronixFlails

Honorable
Nov 26, 2013
5
0
10,510
I just got Battlefield 3 and I played it on my laptop, here are my specs:
Nvidia gt650m
8gb ram
Windows 8.1 pro
i7 3630QM
1tb hdd

I saw this:http://www.youtube.com/watch?v=6q-c-dFUZqE and set mine to the lowest settings just for even more fps. But when I play, it stays around 30 fps when there isn't any action, if anyone (including me) starts to shoot I can go down to 10 fps. Any halp?
 

KronixFlails

Honorable
Nov 26, 2013
5
0
10,510


It idles around 40°c, and goes up to 70°c under load. Room temperature here is usually 30°c if that helps.