I would not want a overheating CPU to shut down. But it is good protection for the CPU. But can damage the motherboard. Many times it can melt the solder on a BGA CPU or melt a plastic CPU socket. Some people drive when the Oil light on their auto comes on, and wait till the motor blows, then check the oil. Same with water temp light. I call them DA indicators. I like to fix something at the first sign of trouble. It is cheaper that way. But as you know it is easy to be a pro crastinator.