I built a TEC set up, I have a 226watt tec cooled with a waterblock with outside air ducked to a 120mm Radiator.
This takes most of the heat out of the water, but before the water goes back to the CPU block i have it passing through about 40ft of 10mm copper piping coiled and immersed in a chiller box full of water. there is also the cold plate from a fridge/freezer In a U shape which is sitting inside the chiller box. This gives extra heat capacity because of the extra volume of water, plus the ability to leave the fridge on over night and do some super cooling with -25 water temps.
I usually dont have the chiller on when the pc's off cus it doesnt need the extra capacity, it cools fine jsut turning it on when i turn the pc on, all the water starts at room temp and rises from there. i get coldside temps of about -36c with it off the cpu.
I live in the attic of a large house and its freezing in the winter and cooking in the summer, air cooling is nigh on impossible in the summer which is why i built the cooling. I have seen max CPU temps of 17c with my pelt cooler during a 20 hour up time on one of the hottest brittish days for 30 years.my other pc is at 67c with an AX-7 with 80mm fan Xp2400 at default speeds, all case sides off and extra cooling.
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My room is 33c and i'm cooking!!!!
I wish i was as cold as my cpu.
LOL.
cant wait for winter temps, that frosty outside air will chill the bugger out of the water and i wont have to turn on the fridge bit at all!