this just started 2 days ago, if i play i high end game like bf3, moh. the pc will shut down. took me a day to find out it was due to over heating, i haven't done any updates to the os or the bois. on speed fan temperatures are around 62-80c. and core is stuck around 60-68c, it has only once done that due to a wire stopping the fan on the graphics card before playing any game it never went higher then 64c, i check the pc while running all fans are working and nothing is touching them.
im out of ideas