Use in a car, its silent
Or use the same stuff you put in the radiator of your car.

Question:

Is there a topic with a list of all the board and the minimum temp they operated.

Like:

Forum name..., mobo…………......…, temp startup, temp malfunction, age board, power-supply
Rijk………........, Commell 673NS……, +9C……......., +4C……….........…, 17 moths., M2 / DSX12VD