I have Lenovo Z50 with graphic card Nvidia Geforce 480m and i want to play DOTA 2 smoothly. When i play the game offline it is okay, but when I play online It shutdowns 20min after. I think it because of overheating. Does nvidia 480m really overheat early? what can i do to lower its overheating problem.? does nvidia 480m is not capable of DOTA 2?