So for my first post here, I have a question about safe GPU temps for an Nvidia Geforce 540m 2 gig graphics card in a Dell XPS 15 L502x. When idling, the temps are around the upper 50s. When playing a game, the temps reach 80-90 degrees Celsius. Are these temps safe? Should I be worried? I've also done my first ever fan cleaning yesterday. The fan wasn't that dirty, so I sprayed it with some compressed air and closed it back up. Should I check the heat sink?