Speedfan is good for Intel CPU core temps... but the sensors for the chipset and GPU are sometimes way off. If you really think your board is burning, there is a simple test. When it is reporting 72C, open the case and lightly touch the heatsink on the chipset. It is copper with MSI on the top. If you lightly touch it and it doesn't feel like it will burn you... then touch it a little more firmly. If it doesn't feel like a hot coffee cup, just like slightly warm water... nothing is burning up.
You can also just put your hand near the components and try to feel ambient heat. If any of the parts have more ambient heat than the CPU or GPU... then something might be too hot. But I really doubt the readings for the MB sensors in Speedfan. It told me my chipset sensor was 100 C, but if I touch it, it is very cool. Not much warmer than my ambient air temperature in the case.