Directly said the numerical value, 50 more normal, games, etc. in 60, when 90 degrees will appear card machine phenomenon.
Impact on the motherboard temperature has a variety of factors, hardware in the normal use of the environment and conditions are constant, fluctuations are not, the software will certainly affect the computer temperature changes. and different brands of motherboards, with materials, workmanship, technology, and other diverse, will also lead to temperature is not the same.
For the motherboard is generally higher than room temperature 20 degrees Celsius is normal, the temperature is too high will affect the North Bridge chip, which will affect the memory and CPU data exchange, many of the motherboard after the burning can see the back of the motherboard North Bridge chip or motherboard power supply part of the color has become darker.
Other motherboard overheating caused by the problem, is generally affecting the motherboard power supply and the bridge near the circuit, such as partial circuit overload, coupled capacitance can not be very good filter stability of the current direct phenomenon of the crash. If it is an integrated video card will appear flower screen, or suddenly black screen and so on. Because the integrated graphics card in the North Bridge chip.
For the heatsink of the motherboard, you can install a North bridge heatsink or add a fan to the chassis.