Toshiba Satellite A660-1EM with integrated Intel graphic card and Nvidia GForce GT330M 1GB. 8GB RAM. If I disable Intel graphic adapter, screen goes black and I can only restore it by rebooting in VGA. IS this normal behavior?, I really think the NVidia is faulty. The first time i ram Diablo 3, a message came up telling me that Intel HD graphics were not enough for the game and bla bla...either way it worked, but eventually turned off because overheating.