Change temperature at which fan tus on?

I own a Razer Blade Stealth. Absolutely love it. Sometimes, however, the CPU temperature shoots over 80 degrees C, especially when watching videos full screen. I have done some research and found it is perfectly normal, because Razer does not allow their fans to tu on until the CPU gets past 90 degrees. That being said, sometimes I worry that the circuitry will get damaged from the intense heat and would like the fan to start at a lower CPU temperature, preferably around 75 degrees C. I tried to find some sort of BIOS setting, but there was nothing there. Is there any way to change this, maybe through Windows? Thanks!

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