The Ultra ChillTec Thermoelectric CPU Cooler is designed in such a way that the TEC part does not begin to draw power until a certain temperature is reached allowing you a bit of savings in electricity.  It also comes with an LCD panel to display current temperatures, fan speed and the load that the TEC is under.  Since it is a TEC, the cooling capability is quite impressive allowing you respectable overclocking potential, as Legit Reviews proves here.
“The Ultra Chill-TEC’s control unit does not apply power to the TEC unless the CPU reaches a certain temperature. Up to this point, the CPU is cooled by the heat-pipes on the “cold” side of the TEC. Once the CPU is hot, power is applied to the TEC and the CPU is chilled. The hot side of the TEC is cooled by the second set of heat-pipes.”

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