The Variofan 8412GMV is a 12V DC-powered 80mm computer cooling fan with a large two-pin plug (compatible with some power supply units). It is a variable-speed unit with three wires; the green wire has a built-in thermistor (temperature sensor), which determines how fast the fan will run.

The fan is quieter than some original/stock computer fans. Power consumption varies; the maximum is 1.6 watts, lower than some 80mm fans. It will directly connect to some computers; for others, modification is necessary. It can be purchased for under ten dollars, including shipping and handling costs.