An improved computer server that generates less heat, requires less energy to operate, and is capable of operating in much higher temperatures includes a power conversion assembly that receives standard 110 volt or other voltage AC power and converts it to unregulated 48 volt DC current externally. Then the 48 volt current is fed into the internal power train, and converts that current to lower voltages for use by various components within the server. Additionally, the size and shape of the server housing allows for more efficient heat transfer, wherein the housing, in a preferred embodiment, has a lateral cross-section with dimensions of between 3.5 inches to 8 inches of width and 3.5 inches to 7 inches of height. The server also may include heat and humidity sensors within the server housing, and these sensors are operationally connected to the fan used for cooling the server.