I have a asus eah radeon 5450 1gb ddr3 low profile card installed on my system. This system only has 2 default fans in it + the power source fan and I am not sure of the size. I believe the idle temperature is high due to the excessive heat/humidity lately. That being said this currently idles around 50 degrees Celsius and 70-76 degrees on a full load. What is the maximum safe temperature?