Antminer's reports of temp are NOT Celsius they are Fahrenheit.
So when you boards are reporting 80C ....do you really think that they are 174F...are you mining in a bakery oven?
ALSO if you think about computer electronics like GPU mining, 70 Deg C is not that hard to believe. if that was Deg F, then Why the F*!$ is my house getting so hot! :-)
Good question!...probably the same reason I have the AC on, the windows open and it's 41 out in NC...something about 6 S9's and 4 L3's running in the house....I'm living in a blast furnace...
