i am using ubuntu 12.04 LTS kernel 3.2.x
i was having overheating issues with the nvidia graphics card.
I installed the bumblebee project for a temporary solution. As a result i have to manually turn on the graphics support using optirun.
sudo add-apt-repository ppa:bumblebee/stable
sudo apt-get update
sudo apt-get install bumblebee bumblebee-nvidia
Is there a tweak to avoid heating and be able to use the graphics card like we do in windows?
Bumblebee is the tweak.
NVIDIA have chosen to not support it, and so that's the best you're going to get for now, unfortunately.