Patent ID: 8392033

Claim:
A system unit for a computer, comprising: a plug-in card having components; a ventilator for cooling the components; a temperature sensor; a position sensor which detects a position of the system unit one of in a built-in cabinet and in an installation location of the system unit; and a controller for setting the ventilator speed as a function of a signal output from the temperature sensor and for setting the ventilator speed as a function of another signal output from the position sensor of the system unit; wherein the controller sets a first ventilator speed if the position sensor detects that the system unit is arranged vertically such that a first side of the system unit faces downward and a side opposite to the first side of the system unit faces upward; and wherein the controller sets a second ventilator speed that is higher than the first ventilator speed if the position sensor detects that the system unit is arranged such that the side opposite the first side faces downward and the first side faces upward.