Depends
Set ALL settings to low, except AF (x16) and mesh (medium)
Run at low resolution 800x600 (windowed) and use (BF3 Borderless - Realmware BF3 Tools) to make fullscreen (less memory load)
Download throttlestop: ThrottleStop & RealTemp Discussion
You probably have a Core2 something
https://img638.imageshack.us/img638/5...echinferno.png
Set multiplier and VID to highest value
Don't tick any checkbox below
Hit "save" and "turn on" (if it's not on)
At this point you should minimize it
Download: MSI Afterburner
This enables OC of graphics card to make it faster (beware heat though, clean your laptop vents+fan hole)
Download: What's New | GeForce newest drivers
Make sure your power management in windows is set to have 100% minimal and maximal cpu usage.