Is it 65W at 5V? [Ooops - did I reply to the wrong page?]
Re: "what about using a TEC Thermoelectric Cooler Peltier 12V to cool down the pc?" - you can use the one you linked if you have a spare 10A-15A lying around. Even small Peltiers take 4A.
Most CPUs are under 5V (eg, 3.3V or lower) but system may still require 5V or 12V for other things.