The power requirements of a server system, regardless of its form, are higher than needed by a desktop or laptop computer. Gilster's law (of everything computing) says:
This pretty much sums up the power and cooling systems for servers. The amount of power required by a server, measured in watts, is determined by the components installed and the devices attached to it. The same goes for cooling. The amount and kind of cooling required is a function of the heat generated by the components under power. However, whether the server is a stand alone computer or a blade server in a data center, the device power and cooling systems must provide a sufficient level of service to power and ventilate its components. The challenge in choosing and installing the right equipment for these tasks is anticipating growth...