I did... but using peltiers is very complex and increases the chance of frying your CPU when used improperly by a thousand times (if you use it improperly 99% of the CPUs will get toasted).
Anyway that peltier junction is unable to cool any modern CPU. It can only cope with 50W of heat before it start heating the cold side. Most modern CPUs emit atleast 60W of heat. And even if you get a sufficient watt peltier then you will need to use watercooling because aircooling can't cope with the enormous heat it gives.
If you want to know more about peltiers ask me... I did my graduation project about them.
My dual-PSU PC is so powerfull that the neighbourhood dims when I turn it on