So why don't we find more of these coolers nowadays? The most likely reason why thermal electric cooling grew out of favor was the increasing power demands of newer processors. Imagine having to use more power to cool an already power hungry processor. The Peltier effect by itself had low efficiency and these coolers could consume up to twice the amount of electricity compared to the heat energy transported. Those who went for extreme overclocking also faced problems with condensation if they went too far. Therefore, it is now quite rare to find such coolers in the mass market compared to hybrid ones using heat pipes while some overclockers have gone for the more extreme vapor phase change cooling..



Link: HardwareZone