I've been playing with Peltiers for quite some time, experimenting and learning from mistakes, I started out with the Tec 12706 which took 6 amps and have just begun using the Tec1 12709 that takes 9 amps which is much better. I have a cooper radiator used to cool the hot side of the Peltier, 2 pumps to move water for water blocks, one for the warm water generated and one for cool water going to the CPU. So the 12709 allows me to go from 2 tanks with Peltiers to one smaller tank and my next test will be to just cool the water block that will be on a CPU. In the back of my mind I keep thinking about just mounting the Peltier on the CPU itself with a water block on the hot side. I've worked in electronics and already have a transistorized regulator for temps where I can control the temp the Peltier gets to. My biggest concern is damaging the CPU. Any thoughts on this would be appreciated.