How to cap my fps?

Im sick of my fps spiking from 150-215 on my laptop because it makes my screen freeze so I cant switch weapons for a split second, or lose my recoil control, or not even be able to move out of the way and other stupid crap like that which always results in a... death.

All because of these random drops from 215 to 150. SO, I want to cap my fps at 135.



Can anyone help/tell me how to cap my fps at 135?

Should I call tech support?

Or should I just order the Alienware m18x laptop?

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