
Peltier elements are not the right thing to cool a CPU. If You want excellent cooling You must use a water cooling system similar to engine coolers in cars. They are available in many electronic shops in Germany. Try CONRAD.DE. Of course they are very expensive too because of all the safety precautions not to flood Your PC.
Peltier elements can produce 60 degrees of temperature difference between both sides. They take a lot of energy and do not only produce cold but also very hot sides of the module. To get rid of the heat You will have to employ a big fan and a very big heatsink. A small element is normally rated 2,5A at 12 to 14 Volts. And this element is NOT enough for a (overclocked?) CPU.
Regards
HTG (Herman the German)