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.
Peltiers have been discussed as cooling options in the past but they require a lot of power and it's not clear they are that efficient. I don't recall anyone who has used one.