Well, I'm back yet again. A scant few weeks ago, I took a look at Thermaltake's fairly good ProWater 850i kit, making just one observation - performance could probably see a great improvement if another, larger radiator had been added. While this concept had in fact been done before on their BigWater 745i, it was stunted by mediocre radiators, a weaker pump, and an older waterblock. Considering that two of these three factors were corrected in the 850, logic would dictate that throwing the third improvement in would make this kit really shine. Though it's a shame that I don't have the older kits on hand to give a performance review against, I feel that this pair of reviews should give users a good idea of the performance they stand to gain, provided they have the desire, and the space to plumb a second radiator, as well as a videocard waterblock into the loop. That being said, let's crack open the box and see just what a $70 upgrade entails.